Lego compatible Johnson Motor Mount

This mount allows you to use a Johnson Motor(73,74x36,7mm) in a Lego Model to get more Power. The housing has holes on two sides to supply the engine with air for cooling.
The axle adapter only works with motors with a gear on the axle.Depending on the gear diameter, it is sufficient to soften the adapter by heating, if not you have to change the inner diameter of the adapter.