Roughing up the light housing to accept the Hella units.
I will make a set of supports using alloy first then use steel, these will hold the adjustment screws.
I will "weld" these in using resin and add a couple of rivets when in the correct position. Once all the position is correct I will make a cover piece and paint that silver to hide the mounts and keep the OEM look through the lens.
The cut-out in the top & bottom will get a fibreglass and filler layer once I have checked the clearance. I will try and make the little bulge disappear by building up the removed plastic to the original pattern including the two triangular bracings found on the OEM units.