the latch mechanism was pretty simple. made a small lever and connected the handle to the latch with piece of 1/8 x 1/2 strap. and added a small spring to keep out any rattles. then for an inside handle I realized the old window cranks had a square hole in it that fit the shaft of the door handles. but I had already cut them off, so I welded them back on and cut to the length I needed and drilled and taped threads in the end for the screw that holds on the window crank. couldn't believe how easy all this was to do.