Left door aft pin block is not working properly. Excessive force is required to close the door and the bottom aft corner sits proud. After checking it seems that i enlarged the hole in the wrong direction resulting in misalignment and bottom aft corner sitting proud. I cut a new pin block out of a delrin big block, drilled the screw holes. I used the pin block with the pointed bolt to redetermine the center of the 7/16 hole. Drilled the hole. I prepared also a backing plate from 0.40 aluminum. Matchdrilled the screw holes. Mounted and adapted. I had to repeat the process a couple of time due to slight misalignment and non satisfactory result. I finally succeeded and the result is a smooth operation even with the seal mounted and the bottom aft corner is less proud (less than 1mm). I am considering to repeat this for the other pin blocks as i am not fully convinced of their strength.