I built my own and all i could raise them was 3/4in, because of cable length.
I have put home made risers like you described on both a 650 and 400. You will need to rearrange the cables a little.eyes5002 said:has anyone put the 1 3/8 " set back ones on their 400 or 650 and if so how did they fit? [as far as cable reach etc. thanks eyes5002