Yeah, they close tight and evenly - don'tcha worry.
The brackets came with the cylinders from Darrel at Sierra Giant.
I glued the bottom of the cylinders with the cylinder rod fully extended and the doors perpendicular to the wing. The collars controls how much the door closes, not too less and not too much...
If you use the brackets, but on one side of the pin medium CA and kick it - these little buggers move after awhile