one thing about test stands for breaking in engines is that the latest talk is that test/breakin stands are not good for engines. except the PSP vibration mount stand that simulates the engine mounted in an air frame. DLE and several other say dont break in an engine on a stand.

The thoughts are that a heavy aluminum mount that mounted to a heavy base doesnt allow the engine to rock and vibrate the same as mounted in a light weight air frame. the engine will be broken in with no movement then ran in an airframe that allows the engine to move a lot.

Do as you wish because its just a hobby. if i was competting with an engine though i would surley break it in the way i was going to run it.