For a Mechanical version a Soverien bolt or a PPS type ram mounting system is the way to go.
This bolt/ram design requires an MQ valve.
The cycling noid is encased in a metal housing, bolted to the side of the body seems better than hanging in the breeze like most E-blade cockers.
One 10x32 tapped hole is the only machining required to the standard cocker body.
The Belsales .44 magnum ram fits in a stock body and it is the best ram I have seen for a cocker.
I used an E2 kit mostly to power the MQ valve but the backlit LCD screen and optical trigger are nice.
I wish there was a single trigger E2 frame that took 1911 grips....