My Xizang details...
SN / MADE IN USA Stamping - GTX96110 (just eight prior to MerlinBoy's), No USA stamping.
Seat Tube Insert/Shim - No.
Head Tube Shape - Straight outside.
Rear Brake Hanger - The ring.
Rear Dropouts - GT logos, Ti.
Cable Routing - No internal routing, typical one sided...