Machine tools and stuff...

Must be a fancy set of clutch aligning tools to require a felt lined box

IKR? Last several clutches I've done, I used the plastic spud that came wif the clutch kit. Close to 30 years ago, I turned up an alignment spud from a wood dowel for an IHC Loadstar clutch. Used a metal lathe. Worked great. How's that fer sophisticated? . :D
 
How far do they expand?
Four general purpose mandrels M0, M1, M2, M3 ranging from 3/8″ to 1 9/16″
Good info here: