Hello guys, first post here. I have a Marshall 5210 from 1988. Does anybody have any experience with this amp? Basically the gain knob form 1 til 8 is pretty much useless. How can i fix this? It would be so nice to have a good crunch on this amp without having to set the gain on 9 and use my guitar volume on 2/3 if i want a bit less distorsion. Any help would be greatly appreciated.