Thank you for the post and all the directions on making the air assisted Master Caster. Completed mine and have now cast over 1,000 45's.
Will have to make the drip shields. Leaded up the springs and the plunger while fighting a drip. I did have to use 2 of the springs to get a good return.
Also made the air assisted lubrisizer, works great, Thanks again.
You caused me to get a xy table for my drill press to do some milling
This is a great site.