If you have a Strike Multipad that's had an unfortunate bump like mine did, and broke an encoder off...This video will show you how to get into the unit, and what you can expect, so you can decide if you should attempt the repair yourself, or take it to the repair shop!
Part number for the encoder:
Manufacturer: Alps Alpine - PN EC11J152040F
Bourns PN PEC11S-9 2 20 F - N 0015
Alesis, Strike, Multipad, encoder, knob, switch, pot, broke, broken, repair, fix, solder, how to