For what it's worth; I believe the recoil spring set up illustrated is a Louis Seecamp design; I know it to hace been used on the little Detonics .45. It WORKS.
The Combat Master line of pistols from Detonics is smaller in the grip, by more than half a finger, than the Colt Officer's/Defender line. Gives real meaning to the words" Get a grip"
Don't start no s**t and there won't be none, Terry