[jcraigau]

I'm still hunting down the Sigma booster to no avail.
I've seen one online but it's a little bigger (by half an inch) over the standard Sigma booster. There are two kinds with different of rod diameter and rod end length.

Does anyone know the specifics of the Sigma booster?

Two options;

53-2020:
ROD DIA- 0.389”
FROM FACE OF SHELL TO ROD END- 3.857”

53-2024:
ROD DIA- .400”
FROM FACE OF SHELL TO ROD END - 3.730”