Hi, Bill

Thanks for the explanation. I keep in mind that servos must follow the stick movement as closely as possible without any "hicks" or jumps from a position to another.

May be one day, I'll try the twinsync with two of my KPS 12 Servos ... as there is some clearance in the "lack of bushing" ( LOL !!! ) ... the deadband, seen from the control surfaces is quite astonishing
Some nostalgy of the on/off R/Cs ... may be.
I Still Own an operating KP4B " Series 70" set, I got directly at the factory ( 4 th of the series !!! )

<< OK... I've given out enough trade secrets...>>
... yess, you gave here lots and lots of info [:-] .... shhhhhhtttt !!!!

Make me think it's better to have the Engine RPM following "linearly" the servo position ( think to OS .61 SF and RF W/Pump series where very little RPM difference inthe second half of the carburettor aperture ...). Just play on the servo and carb arm angles for that.

That also follows what Robby said some posts upwards.

And so did BillS !!!

Thanks once more

Alain