T47i as in T47 internal. Ztto sent me a tool with the BB. I did the BB a dis-service.... on dis-assembly the BB was still perfect, it was the ratchets in my rear hub that were gritty.
I've had no problems with the drop of the bike and pedal strikes, not sure if the drop is the same across all sizes (mine is a size small). There again, I'm not doing anything terribly gnarly on the bike, largely broken tarmac to grade 2 gravel. I basically ride it as a winter bike when it is too muddy / unpleasant to take my SPCycle hardtail 29er out.
Mine is currently in winter mode and I'm very glad it takes full metal mudguards, this was partly why I chose the frame.
Overall I'd still highly recommend it.