155mm cranks? Sound like you're size deficient in several areas.

I was totally up to tinkering and solving all these tiny issues - as i completely expected from a Chinese frame.

The stuff that challenged me most was also the cockpit.. bars slipped on the first ride (because I "too carefully" torqued them up).
Now with greater torque, everthing seems fine.
Coincidentally, I asked a couple of hours ago to VB for the max torque just to be sure. I will edit it in the post later when they reply =-

I actually never build a bike up before.. but it was surprisingly more straight forwards than expected.
Also had to cut the fork by myself.. but with care that was easily enough.
But.. for sure.. specific torque settings would have given me more confidence in the build stage and test rides