Just went out and tried the grub screws with the scope still parked. Initially I could easily pull the drawtube out by hand.
All the outer (smaller size) grub screws were tight. I then checked the two central larger ones, and found the rearward one made little difference as I tightened it. The forward one made a LARGE difference, but in reverse.
The tighter I made it, the looser the drawtube. So, I loosened it off, while 'pulling' on the drawtube and found a nice point where the grubscrew was not slack, and the drawtube resisted my pulling attempts, while still moving smoothly with the focus knobs. I also noticed that the flat on the bottom of the drawtube is not real clean, so eventually might open up the focuser just to check what's inside
I've left it there and will try again later with the scope vertical. It looks promising.
