Collapsible or Solid Tube

[Louis D]

1 hour ago, Buzzard75 said:

I was referring more to the secondary and having to take apart the trusses, but yeah, the primary almost always needs to be slightly adjusted as well.

I find my 15" mirror slips a bit on the 18 point cell being it is only held in place by a sling and two pegs on the sides.  The mirror also tends to flop forward near the horizon.