It looks like everything was done in a very workman like manner.  Are there any markings or a Cartouche on the stock?  How was it sporterized?  (Barrel length, front sight, modification of fore-stock).

Is there any interest in a modern (CNC) version of the Parkhurst attachment?  One that would work with British chargers?

Yes, It can be reproduced but would need to have one to make a mechanical drawing of it and show it to a friend to see what the cost would be per unit. I am sure it it be around 150-250 per unit unless there were a large order and then the price would then come down some but cant say for sure till I were to show it to them.

yes this is true, but some would pefer the Parkhurst cost be damed.

My money would go to high quality 'drop-in' Krag rifle and carbine stocks & hand-guards!  (Like the CMP 1903 Springfield stocks).

As to the feed - that is why I believe the guide-lip is different, since the cartridges are coming in a precise path, as opposed to being tossed at random, the lip can be higher and more beveled to translate the downward push to a sideways slip.

As to the rules, I do not know - I'm fairly sure they'd have to accept a real Parkhurst, but would not be too surprised if they balked at a "Steinmayer Device". 

I'm sure I have read something about the device actually acting on the clip, as opposed to just being a guide slot and no more.

While the inletting does not appear to have been done in one pass of the cutter, it is certainly nice work! For that matter, I'd guess that the real ones are custom inletted as well - doubt that they would change the tooling setup for a couple of hundred pieces.

A similar case occurs with the 26" BoOF stocks, but simpler, all they had to do (in addition to NOT doing something) was crank the clamp over 4", with no cutter change-out required. The increased taper was likely done by just a little longer stint on the belt sander.

I don't know where this recent find fits into the chain of events, but IMHO it should be treated very kindly, and nothing done to it in a rush. Sort of a treasure, really - could (even if a lunchbox special) wind up being quite valuable. Of course, if it could be some sort of intermediate prototype between 4070 and the production guns, it could be almost priceless.

Does any one even have any striper clip for a Krag? enfield clips work for Krag ammo, but are not designed for the Parkhurst. I am sure if asked for the modification it could be done, but then it is no longer orginial issue part. This would then allow it to not be allowed  in ventiage matches.