My homemade 3rd member holder, I used it I bet 5 years. Something I threw together one night to make service easier. It works.
Then I bought a real one that holds heads and other things too.

4X4 block of wood works good to hold lifters.

I did not make this push rod holder, but my buddy did. Homemade clutch disc indicator fixture under that clutch disc.

He's very crafty.