I was thinkin' along the lines of a DR centre mounted scear like the following H. Scherping & O. Geyger:

>>M-4 modified his search engine parameters and stumbled across this H. Scherping fitted with the cream of the crop Witten Excelsior tubes for a client/retailer George M. Wright of Danville, Ill. I'm sure a diagram is around here somewhere, but does anyone have a diagram or image of the centre mounted scear at their fingertips, which is seen more on a double rifle platform????<<

https://doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=270357&page=all


[Linked Image from thumbs2.imgbox.com]

WC(Gallopin' Bovine) on DR platform:

>>The issue with the A&D traditional action is that the sear is mounted very close to the tumbler axis. This requires a very wide sear to reduce the working pressure and it also makes an intercepting sear a wish-able feature.
The overhanging sear is IMHO superior, because it is mounted much farther away from the axis, and therefore does not require a wide tumbler, which allows for a thinner cut in the bar, an easier sear filing, etc...<<


[Linked Image from i697.photobucket.com]
O. Geyger Berlin with centre mounted scear.

Hochachtungsvoll,

Raimey
rse