You are only going to be soldering to the ground traces, so there's not much chance of messing something up. I was hesitant at first also, but now I can do the ground mods on a Sys80 in about 3 minutes once all the boards are pulled (which only takes about 5 minutes).
I'd be glad to do it for you if you are willing to pull the boards and drive to Rockford....hate to think of what they will charge you for a house call.