thanks i uesd the mechanical retracts that came with the plane,i just added the robostruts ,and yes it is brass tubing for the guns i have to take some new pics of the plane,i painted the guns and i had a little accindent with the wing i was putting everything away and the wind picked up my wing and dropped it on top of my hanger9 p40 prop blade,it whent right thru the wing
just a nights worht of repair and back in bussiness