Has anyone purchased a CS-156 27.5er from Peter at all?  I ask because I have encountered an issue with the frame.  Basically, the rear brake caliper is not sitting correctly.  Even with different brake calipers, the frame's left seatstay is not allowing for any caliper to be mounted correctly or inline with brake mount bolts.  I have emailed Peter numerous times peter@xmiplay.cn and I am not obtaining any resolution from him.