This motor mount was made from 3/8 aircraft aluminium using rubber soft mounts from Rocket City.Works superb to cut the high frequency vibration produced by the big Blocks singing in harmony.The milling/drilling work was done to save some oz's of weight.It is fixed to the C.F. reinforced botton and to the wood sides .The rear side of the motor mount lays on recession areas made on the botton to lower its height.