Hello... I'm repairing my bass amp, Marshall DBS 72115, and almost finished, but there is a part that i can't replace, because it only says "marshall". I nedd the electronic scheme, but it's being very hard to find, unless in marshall or authorized dealers, that will make it 200, with something that costs 10. Do you proviide or know where to find these schemes??? Another thing, i have a Yamaha TRBII, 5 string... a can not put the strings as close to the arm/neck as i wish... iwaht are my solutions(possible solutions). I think the arm is still good...or not(sorry if a can not explain my self very well in specific questions) Thank you.