Hey all, I'm in the cabinet design phase for a SI HT 18 I pre-ordered yesterday. Its going in a sealed box. Im planning on a thick baffle, at least double thick maybe thicker. Im using MDF throughout but have been reading some comments on the use of t-nuts and bolts for the driver. I have used them them in a 2 way build with a 6.5" woofer and thought they were a pain as I didnt have a drill press and had some alignment problems. I was thinking instead of using MDF sandwiched to 3/4" hardwood plywood and using heavy duty wood screws into the plywood. I was just wondering if that would be strong enough for a big heavy high excursion woofer in a sealed box with a big amp on it.