Hy!
Thank you John, I did not think of finding this kind of defects with the quality optical which we know of Riccardi Honders!!
I am not against a small alteration of the collimation from time to time, but if it remains comparable has my C9, I would go even somewhere else, and can be one 106??
This Tube pleased me for that focal speed , thus has to see!!
Bye !
@lex