Lid Prop andle

[Ryan, Philip]

Hello List:

Enjoyed reading the anecdotes of lid prop failure.  I'm in the process
of replacing a double lid prop on a rebuilt piano without any former
marks.  Anyone got a solution for measuring and/or setting the 90 degree
angle on the prop stick and lid, and also what angle should I use for
the small prop?  It's never had one before.  (My Junior High school
protractor is not big enough.  :)

Does the small prop put excessive strain on the lid?

Would love your comments.

Thanks,

Phil Ryan
Miami Beach