Hi Steve
Just to clarify, this scope is not made of red oak. I bought the plywood from plyco. It’s exterior grade and there are no voids. Most of the ply I use in scopes is like this:
https://plyco.com.au/pages/birch-plywood-collection
I’ve made two round plywood tubes as described here:
https://www.iceinspace.com.au/forum/...d.php?t=174149
I like round tubes for larger scopes and octagons for 8 inch and under.
Rod.