Basically i get a really bad tight spot.. 1 side of the crank is the perfect tension and the other side of the crank is phenominally loss. Usually i wouldn't care but i got a neon frame and appearently there known to suck chains and make holes in the stays! So as you can imagine i want to keep a tight chain all round. I am currently using V!Z Snail cams, rear profile, new trialtech cog and a Ko-Bike 128mm isis BB, If i was to swap to a 118mm isis would this stop my tight spot? Thanks Sam.