The absorber attachments are probably the easiest parts to make, just a small U profile with some holes in it. There are actually two different types of absorber attachment: “frame” and “suspension”. The difference between the two is the dimension of the hole used to mount the absorber: one is 3 mm and the other is 7 mm. And as the names suggest, one is mounted on the frame block and the other on the suspension block.
4.1 You know the drill by now (pun very much intended!). Mark all the holes on one side, then drill them with 2.50 mm bit.
4.2 Using 6 mm bit, enlarge the holes that will be used to mount the attachment to the suspension or frame block.
4.3 If you want to mount this attachment to suspension block, enlarge the small 2.50 mm hole on the side with 7 mm bit. If you want to mount it to frame block, use 3 mm bit. In both cases, drill the hole all the way through the opposite wall of the profile.
There, one of the attachment is finished! You need six frame attachments and six suspension attachments.