A friend found a C.G. Haenel System Aydt on consignment in a local gunshop.  It's a very nice looking rifle, appropriate German tang sight, even has a clock key for adjusting.  The action looks like an Original Aydt.  But the tag says .22 Long Rifle and the gunshop guy says it has a liner.   

The asking price is $1800.  Seems high, especially since the price of nice single shots seems to have dropped of late.

But what bothers me (not having seen the rifle) is how do you put a liner in an Aydt action and make everything work?  When closed, my Aydt has a space between the face of the breech block and the breech end of the barrel that is nicely filled by the rim of an 8.15x46R made from a .32-40 or .30-30 case.

Firing pin?  Extractor?   

Another friend has a C.G. Haenel single shot Schuetzen gallery rifle in .22 LR, but it is a different action, not an Original Aydt.

What are your ideas?