I have a collector's grade Polish underfolder kit. I am not a big fan of underfolders, but they look great and I didn't want to pass up the chance to own such a nice one. I have been thinking of having it built on a milled receiver--expensive, but the extra weight should make it more comfortable to shoot (the reason I am not a big fan is the jaw-popping discomfort of the stock). Have there ever been any Polish underfolders with milled receivers? Based on the date code of the kit I know I am not building a hostorically accurate kit with a milled receiver, but I wondered if there was EVER a milled folder.