In an hour I will know if my latest revision of the S2/TC door hinge adapter bushings is correct.
If it is I will begin printing them in bulk.
The ball inserts are inexpensive.
My printed bushings are cheap, the price of hardware is somewhat high.
I also have to make some insert bushings to adapt the balls to the bolts, I expect to do them in aluminum on my lathe.
Lots of options for the bolts, steel, aluminum, titanium, how light do you want to go?
It may be worth mentioning that even with steel hardware there is a significant weight savings with this hinge conversion.
Not ready to set prices yet, but this will be much less expensive than any other option on the market.