ORIGINAL: Geistware
Not with the BME twins.
You can drop the throttle to idle on landing, and it will idle down but still be running a little fast until after it is below flying speed. Never understood why but I have one and a friend has one and they both do it.
ORIGINAL: Silversurfer
Sounds like you need to try a different prop. Engine spool up on a down line and braking are both a function of the propeller, not the engine.
This does not happen with my 110 Geistware, Silversurfer has flown mine a couple of times and he can verify this. It might be something with the timing or tuning.
doorvp--I would not be doing a lot of extended run ups on the ground with any large gasser. Make sure it runs reliably and put it in the air.