Im thinking of mounting it on a bigger square of timber to give it a wider,and more stable footprint.
I may put some ground anchor type bolts into my new garage's floor...when its eventually finished.

Current thoughts are to use a piece of roofing joist (that I have left over) bolted to the top plate,instead of the u shaped small supports. That way its effectively increased the load bearing area from approx two inches to seven inches.
I may cut two parallel lines/chanels in the wood as and extra safety/stability footprint.