Hey there. I've got a build in mind and for the sake of realism (being true to a passenger car), I want to have the ability to rev the engine without engaging the clutch. Unfortunately the only options I've seen for clutch/transmission systems only use centrifugal forces to engage/disengage the engine. Are there any options out there that actuate a clutch plate and function largely like real manual transmissions? Any input is welcome, I'm really hoping that I wont have to build it from scratch.