My guess would be the sillycone has distorted the mirror.
That's exactly right it did.
Its amazing a big hunk of glass can be so sensitive.
The astigmatism is gone now. I need a fan, it never did equalize this morning.
After a hour the stars were still not sharp enough for Mars.
I decided not to wait for the Martians to clear the cedar grove.
The mounting moves extremely well. If anyone is looking for a good design
this is it.
Mr. Berry's book is still available: