I'm trying to figure out the price difference between the Dewalt DW660
and the Makita 3706
I'm leaning toward the Makita down the road because you can purchase the vacuum dust shield that comes with the more expensive kit separately for about $13; part number 193455-7.
Then again it may be a fun exercise to design one for the Dewalt, throw it at Autodesk 123D Make, cut out the parts in plastic, glue them together and mount. I haven't had a chance to play with the software yet, but does anybody know if you can set the desired material layer thickness?