Menco wrote:How big is the risk for screw ups?
Installing the pad upgrade/ ram without a prob, but this sounds too technical for me. Problem is I don't know where I can have it fixed.
if you have somewhat decent soldering skills or at least patience and knowhow its quite easy. but you have to make sure you have the right tools before you attempt this.
as described before.
low wattage iron (30 watts or less) any hotter and you can burn your board easily.
desolder braid or solder sucker - this is very important. it makes taking off the old solder and completely removing it a breeze.
screwdriver
and if you look in the mpc 2500 section look for the thread i made (installing rotary jog wheel) there are two youtube videos i saw the other day that explain how to replace one of the pots (the rec gain pot) and the guy has these two little black hook like objects that he got in an electronic kit. i recommend those (i need to get a set) to easily pry and pull off the connectors that connect to the pcb board. this is also important because taking off the pcb board entirely will make soldering and desoldering etc. very very easy.
i also recommend buying brand new tact switches instead of using other tact switches for buttons you may not use. this way it keeps all of the buttons across the board working. also i recommend buying a few extra tact switches to have around just in case as spares.
i had no solder experience when i first fixed a jog wheel encoder on the mpc 2kxl, it was a pain and i had to do it twice because i didnt do it correctly the first time. but i had patience and carefulness that helped me not screw it up. good luck and any other questions just ask.