Starting on the hinges. From what I understand getting the hinges square is probably the most important part of this step. The instructions have me cut the threads off of four AN3-21A bolts to a length of 1.688 inches. I cut them with a cutoff wheel on my grinder then got the final length and chamfer on the bench sander. I can see that the angle of the hinges is specific to a position on the doors. This is because the top of the cabin is curved and the hinge orientation keeps the axis of the hinges straight. The instructions have you start on the left door and put the WD-1018-L in the left side forward pocket with the WD-1018-R in the left side aft pocket. The instructions don't mention that this will need to be reversed on the right side door because of the hinge angles. I guess that Left and Right means when looking at it from the respective side. They also have you cut a .125 in. scrap of aluminum to help set the edge distance of the hinges in the pocket. I found that the bolt for the hinge set in the left side forward pocket was interfering with the hinge setting square. I had to Dremel out around the head of the bolt so it would lay straight. The aft hinge didn't seem to need as much of this adjustment.