I picked up a Dewalt 735 planer over the holidays, and just finished a tophat push separator similar to the one brdad made ( http://www.jpthien.com/smf/index.php?topic=809.0 )
Good lord the blower on these planers pushes a lot of air! My first test run I only had the top secured with 2 sided tape and it popped right off.
I should probably paint it as it is mostly made of scraps I had laying around the shop.
lol i had the same thing happen to me with my 735 b4 i built my top hat. i had one of those plastic woodstock trashcan lids which was out of my sight for 1/2 an hr of planning. what a mess