Fitted the 20 mm blocks under my 18 xca bar risers today, no issue with cable length. Maybe worth checking if clutch adjustment just needs backing off a bit as it could be artificially tighten/legthen (housing) on full lock to left now, I ease mine a turn as I didn’t have a lot of free play in the clutch cable.
The haynes manual quotes torque settings are around 35nm for the big bolt, do it to spec first, then smaller bolt is 24nm . I put them both in hand tight (with Allen key) before torquing to help everything sit square and prevent interfering the smaller bolts insertion; it also help prevent the bar rolling round while you tighten. I tend to move between the bolt (big to big to torque, then small to small) to clamp down slowly and evenly - probably not necessary but good practise, trust me when you had bolts sheer, you become a bit anal.
There is a small cross hatch on the bar by the left hand clamp to help align the bar in stock position, or at least centred; you can rotate to a different position for preference of course.
I’ve also flipped the risers round 180 which, just sitting on the bike on the centre stand, feels great - I’m not sure why. The triumph bikes at the adventure centre in Wales had the risers flipped and bars upright.
