More on a 17.5" and 10" Strut Telescope...

Here are the top-rings for Dan's 17.5" strut-telescope, with
an "observatory grade" curved-vane spider and Aaron's 10"
strut-telescope with his 4-vane spider. Note the focusers
are affixed to the rings as well. Aaron's telescope is a "kit".

 

The "mirror board" and top ring are completed and ready to
test under the stars.  Date 4/10/21

That's a Moonlite 2-speed focuser and Observatory Grade
Destiny spider with 3.5" secondary. The primary is mounted
on a 9-point flotation mirror cell of our own design. Date 4/10/21.