The LionChief + locomotives have speed control, so throttle adjustments in curves is not needed for the most part.
What Henning's Trains does for the store layout is block the lever on the CW-80 controlling each loop with a screw tapped into the case. It limits the speed to less than derailment speed.
FWIW, I've found that the LionChief PA Flyer set will handle the O36 curves at full throttle without derailing pulling the set cars. The kids regularly crank it up full throttle around the tracks.