well, inside the mouse is a chunk of metal used to give the mouse some “heft”. but for long gaming sessions, that can cause fatigue. i’m not sure what it weighs, not a hell of a lot but still… just unscrew it and toss it in the desk drawer
(you will void your warranty by opening the mouse). can’t say i ever really felt fatigued with it in there, but it has to be better without it for making those snappy 180’s 
with the logitech drivers, i found them a constant irritant, due to their overly complex game detection system, profiles, etc. i’d find my mouse going screwy with stuff like ventrillo, etc. accelleration coming and going when certain programs’ window was in focus… just constant bullshit. i got the mw_advanced thingamabob from logitech to further control stuff, then for a while i used a program called Logigamer for even more tweakage… in the end i found all that crap to be just a bunch of bloat. just annoying really. although for those of you who like the idea of bringing +centerview back to RTCW/ET, and you use a logitech mouse, Logigamer is your answer
you can set it to decrease your mousespeedy to 1 when you launch ET, and reset it to normal when you close the game - essentially locking your crosshair at head level. something a dirty, slimy cheating bastard would do, IMO, but there you have it, the secret is out :disgust:
i’d rather have the peace of mind knowing my drivers are set to one setting for windows and everything else. which BTW i never thought i could stand not having a bit of accell. in windows, but it turns out i found the perfect balance. then again, i didn’t want to use the default windows drivers either (no way windows knows logitech hardware better than logitech does, right?). so i uninstalled mouseware, rebooted (which defaulted me back to the windows drivers), then updated the mouse drivers through the hardware manager using the actual logitech files i had extracted from the mouseware installer file. this installs the logitech drivers ONLY, no mouseware “shell”, as it were. the feel is different, because the speed settings are now handled by the default windows mouse control panel applet - but the foundation drivers are logitech’s. you do lose the ability to assign buttons to keystrokes, etc (at least from the applet, it can still be done manually via the registry), so if you like that convenience you won’t like this option. then, i specified my resolution and other things in the registry - here’s my settings, which may or may not work for you, but the important stuff will be the same:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Control Panel\Mouse]
"ActiveWindowTracking"=dword:00000000
"DoubleClickHeight"="4"
"DoubleClickSpeed"="500"
"DoubleClickWidth"="4"
"MouseSensitivity"="10"
"MouseThreshold1"="0"
"SmoothMouseXCurve"=hex:00,00,00,00,00,00,00,00,00,a0,00,00,00,00,00,00,00,40,\
01,00,00,00,00,00,00,80,02,00,00,00,00,00,00,00,05,00,00,00,00,00
"SmoothMouseYCurve"=hex:00,00,00,00,00,00,00,00,66,a6,02,00,00,00,00,00,cd,4c,\
05,00,00,00,00,00,a0,99,0a,00,00,00,00,00,38,33,15,00,00,00,00,00
"MouseThreshold2"="0"
"SnapToDefaultButton"="0"
"SwapMouseButtons"="0"
"MouseTrails"="0"
"MouseSpeed"="0"
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LMouFlt2\Parameters\OpticalMouse12\0000]
"Acceleration"="Off"
"MappingButton1"="1000"
"MappingButton2"="0100"
"MappingButton3"="0010"
"MappingButton4"="0001"
"MappingButton5"="00001"
"MappingButton6"="000001"
"MappingButton7"="0000001"
"MappingButton8"="00000001"
"Orientation"="0"
"MouseSpeedY"="50"
"MouseSpeedX"="50"
"Resolution"="8"
"PositionButton1"="Left"
"PositionButton2"="Right"
"PositionButton3"="Middle"
"PositionButton4"="None"
"PositionButton5"="Left"
"PositionButton6"="Left"
"PositionButton7"="Left"
"PositionButton8"="Left"
"DoubleClick"="0010"
"ChordDelay"="0"
"DragLock"="0000"
"Disabler"="48"
you might have to apply the current control set settings to all individual control sets - check them after rebooting to see if “currnet control set” applied itself to them or not. what’s important there are SmoothMouseXCurve and SmoothMouseYCurve, as well as MouseThreshold1 and MouseThreshold2 in the windows mouse control panel. also, in the logitech-specific section, what matters is Acceleration and Resolution - which you see i’ve specified as 8 (800 dpi). with MouseSpeedX and MouseSpeedY at 50, and the windows applet MouseSensitivity at 10, i find mouse control in windows to be perfect at 1280x1024 res. and i didn’t really have to tweak my game sens much (if at all) to get it to feel like it did before the switch from mouseware. i used the latest ones, whatever version that is. again, mouseware isn’t installed - just the actual mouse drivers from the package. afaik raziel’s patch applies the same SmoothMouseXCurve and SmoothMouseYCurve settings (although i didn’t check to compare his to mine so i may be wrong), which essentially kills any accelleration applied by windows.
heh, after writing that book it would appear i fancy myself another raziel. believe me i don’t. it’s not like anything i’ve done to my mouse has made me a great player
but i do like the peace of mind from knowing exactly how my stuff is setup, so i can build my game settings and style upon a solid foundation.
i hope that gave you some ideas (and NOT the idea to use that centerview crap
)
*edit: one more thing, happily i’ve found that my mouse buttons simply “work” in my games now, rather than having to go through a bunch of hocus-pocus like i did with “Mouseware Proper” (setting the middle button to apply an unused keystroke within mouseware, then binding the in-game function i wanted that button for to the key it was assigned to in windows… god what a bunch of dicking around that was)