Originally Posted by FXR2
Make sure you check the top plate for flatness. Clean it up, then place it on either a glass or granite countertop. If it rocks from corner to corner at all, it's warped and needs to be sanded flat. No biggie, just use some fine grit sandpaper (220 I think is OK), lay it flat on the same countertop surface and move the rocker box cover in a figure 8 pattern until the the rocking is gone and the gasket surface is flat. Also check the middle piece but from my experience a little off-flat there isn't as big a deal. Hope this helps.
Thanks very much, very much appreciated