well I can fix your problems with the r key :). First, go on GMOD settings. Second, Scroll down to combat. Third, do you see the thing that says reload weapon yea bind it and press r and that is optional you can do any key but i reccomend are cause its easy to remember. Fourth hit apply or ok. Last go on a map and use sub material and press r, or any key you binded and you will copy it :) and it helped me with more things I was able to freeze items with r again and use the r key on pill packs Example Fuppr pill pack :D. *Bad newsish* sorry if you have trouble with scrooling but I dont know how to fix that but mine was always working. Have a nice day