Wow! Could you make a step-by-step pictorial on how you made them for us noobs?
Step 1. Measure the size of the pads (these are 68 mm), and a nice diameter for the mid hole. I made it about 20 mm. Then make a template, and create 4 pieces of lambskin for each pad (or whatever thickness you want). For a 20mm mid hole, about 24 mm is needed on the template. Cut it all out, including the mid hole.
Step 2. Glue the two piles of leather together.
Step 3. Make an outer leather piece for each pad. (this is the only leather piece that has to look good, so select it with some care). That pad should be larger so that it can fold over the edge of the pile. I made i 100mm so that it also goes a bit down over the cup. Don't cut out the mid piece, instead make a very small hole so that you can make a few cuts later.
Step 4. Glue the big piece onto the other pieces. (with the nice looking side facing out.)
Step 5. Glue and fold the outer edge of the big piece over the pile of four pieces, be careful to fold on opposite sides at the same time, otherwise it won't look good later.
Step 6. Now, cut four or five slits in the leather from the middle of the big piece to the edge of the smaller pieces. Then fold that in and over the smaller pieces. (Now if you had cut out the hole in the big piece, you would have nothing to use to make the fold. And if you made the cuts earlier, they might not line up with any tiny mistakes in placing the big piece onto the small pieces)
Then it looks like one of the pictures I posted above.
My wife now thinks I'm completely nuts.
The HOK is still bass light, but it's not completely without bass. It extends down sufficiently for me, with some volume (not so much). It's (currently) lighter than the Grundig which is a bit lighter than the HD580 which is not the bassiest basshead can around. I'll soon compare the three more carefully, to see if the old orthos can win over the 580 in any respect. They make some music more enjoyable, but can't pinpoint why.
Right now, I'm considering whether maybe I should have left the HOK80 closed (it's now open-back). Maybe I'll have to close it and see if it changes in any way at all.