I am using 3/4'' mdf and i flushed out about 1/4'' of the wood for the joysticks, now after that i went to flush on top for the t-nuts that left about little less than half inch of wood left for the t-nut.... now when i banged the t-nut into the hole THE MDF BROKE!!!! and i have to do my control panel all over again...........any thoughts guys thanks