Read the response from Aircraft Specialty (they always respond quickly, even on Friday evening or weekends). Took the measurements they requested and sent pictures. Looks like I have the part for the Van's valve instead of the Andair valve. Tom later confirmed he was sending a new part.

Found updated caliper o-rings, researched alternatives and updated maintenance manual. Researched brake bleeding tools and materials compatible with MIL-PRF-83282.

Found GMU 11 mounting hardware and updated maintenance manual with details.

Reviewed McMaster Carr, Aircraft Spruce and Mouser shopping carts to see if it was time to place an order.