So in retrospect, I would highly recommend adding your rail button (1010 in this case) before your forward CR is dry. I thought I would be able to manipulate the end of the fiberglass tube to allow enough room between the motormount and body tube for the button to slide up into place after it dried. This proved most difficult but luckily I did get it installed. I also had rounded the button back (convex) to try and reduce the metal sticking out so much inside and match the curve if the body tube (more important for the forward button). Here it is installed-tight fit. I used a magnet to draw it up for install.