I have recently built up Bitsa, my MTB, so called because it is built up from bitsa this and bitsa that. I used Jagwire gear cable housing for the final loop to the rear mech, but having a few feet left over I also used it at the handlebar end, on both shifters. It all works perfectly except that the steering feels a little like when the headset bearings are too tight, which they definitely aren't. I am wondering if the cabling, which feels very rigid compared to normal 5 mm spirally wound, is having this effect. The cable routing round the headset isn't tight and the curves are quite gentle.