How does David get power to twin screws on the type II with the 1.25 S/D?

[pjdog]

Sense the 1.25 S/D has a single motor and the type II is twin screwed how does David provide power to both screws? I think I’ve seen some were that David has a big main gear in the middle then two little brass gears on the side. This is how he does one motor to twin screws. Are these parts included in the type II fittings kit for the 1.25 S/D.

I'd like to do a type II but I still have some questions before I start buying Caswell parts for the assembly.

jack