Join Date: Feb 2008
Location: Southern Cali, SD area
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You're okay to pre-drill, glue and screw. No nails; you can tack most fiber board but MDF loves to split, so always pre-drill. I never really needed long clamps.. just a few small c-clamps for gluing the double baffle together and drilling. Screws = your clamps. You could even remove them after, but I'd leave them and fill the holes for a nice finish.
the screws, hold them up to the wood and look. Do they go through two thicknesses of whatever MDF you are using? Screws are cheap, I recommend using the square bit ("R1", 2, etc) and loose threads (you already drilled holes at this point with a smaller drillbit) type from HD. Use lots of glue, let it ooze out and wipe off the rest. I like to seal my corners with liquid nails for added strength. I also use it for gluing the braces to take up small gaps. Use wood glue on the rest, I like Gorilla brand, also from HD.