Originally Posted by
smontanaro
Interesting. Not being familiar with Alex's stuff, can you explain/show how this works?
Alex's description, and a pic of it in use:
http://alexwetmore.org/?page_id=1080
Probably obvious but I'll mention it for completeness: it uses a surface plate with the frame held horizontally above the surface. Not useful without a surface plate or alignment table.
Set the height of the vee to something known to be in the centerplane, say the bottom end of the seat tube, then the vee can check the height of other spots, say the head tube. The outer edges can check the dropout spacing and centering.
Alex's design later was made by Hahn Rossman and sold by Rene Herse (with Alex's blessing).
https://www.renehersecycles.com/shop...lignment-tool/
Note there are two versions, with different selections of hub widths. One of them listed as out of stock.
Mark B