Hey guys..
In all honesty I'd never taken the cable lengths into consideration, I just ordered the risers. I run the 300 handbrake cable and modded the 350 axle to suit, if I have any issue with the cable length I'll probably just buy a 350 cable, I'm sure it was around 2" longer.
I think it should be fine though.
Mac, I'm glad it's not just me that finds the distance between pegs and seat a little odd. I was considering having the upholsterer fit a new seat base(foam) but have it a little firmer and maybe an inch taller. My seat feels like I'm sat in a luxurious sofa (couch), it's so soft!!