Please save me from myself. SHORT VERSION Large plywood sub enclosure. Vibrates. Sucks. RECOMMENDED FIX? (1) Build new MDF box? Don't want to. Cutting little holes in inner braces is a pain. (2) Glue and screw mdf panels to each side to build MDF box around the ply box? (Flush trim each panel with router. 500 screws per panel. "Soft glue" between ply and MDF whatever that is.) Is (2) as good as (1)? Is (2) good enough (ply bracing good)? BTW, easy way to remove striped out t-nuts? LONG VERSION I built a vented EBS Shiva sub with the HS200 amp using Adire's plan. See http://www.adireaudio.com/Files/Vent...plications.PDF . I built the enclosure from "birch plywood" purchased from home depot. I now believe the "birch plywood" to be crap with a pretty birch face. (The ply has 5 layers and screws will self-countersink when driven in with a drill.) The box vibrates to my hand on higher bass notes and on lower notes you can hear the notes through the top of the box when your ear is next to the top. I have it on inch-thick folded over towels so it won't make LOUD buzzing noises on my hardwood floors on upper bass notes. POSSIBLE FIXES? (1) Build an entire new box out of MDF? (2) Build an MDF box around the ply box? (Glue and screw a slightly oversized panel on each side and trim flush with router building a tight MDF outer box.) I would prefer (2) as it would be less work (maybe). Will it be as good as (1)? (is the plywood bracing, etc., as good as MDF?) Thanks for your help. BTW, is there an easy way to remove striped out t-nuts? (Pounded in with a hammer with no glue.) Maybe if I build another 10 subs I'll run out of stupid things to do. Maybe not.