Well maybe not that amazing

But they are kind of cool. I was digging around my old junk looking for a Lehigh breechplug. I didn't find one but I found some of my old orange discs with the 11 nipple inserts. I hadn't seen these in years. It is kind of nice to be able to shoot 209's or #11 caps without changing anything.
this is the orange disc with the nipple insert
this is what it looks like from the other side
this is with a #11 cap installed and ready to put in the gun.
inserted in the gun
bolt closed
After firing
The nipple inserts can be used over and over. The beauty of these were that you could load the discs with 209 or #11 primers and use whichever you wanted. No changing breechplugs or bolts or anything. Just throw in the orange disc with whichever you want. I imagine these are long obsolete but I got I pack left

I also got the 1:20 bedded
which is why I was looking for the Lehigh plug before I got distracted.
So maybe now I can get back on task.