As previously stated, I recently got the JET DC1100C RC dust collector (it's huge) with suction enough to never have pets or small wives walk in front of when in full power. I attached that to the rear exhaust port with a tight fitting vacuum hose size reducer (the 4" to 2½" fits perfectly when you remove the cloth filter section).
RESULTS: Nada, zip, zero in removing sawdust while machine is working. I thought perhaps the breathing fin holes above might have been deflecting the suction, but nope. blocking those (plastic wrap) didn't change a thing. It's just the wrong place to put any type of vacuum and expect it to clear ANY sawdust from the work area. And I haven't tried the bottom yet, but I'm afraid that it'll do a little, but won't clear the top sawdust all that much either. Thus, it's either the side (right) and best, the top through the clear plastic that would be the best. Actually (hint hint) an attachment for something like a very flexible 1¼" hose onto the Z truck would be best, if it wouldn't hurt the action of the truck. That way the sawdust would clearly be removed as the bit would creat it.
That's what I'm finding, anyway. I just made one of the biggest collection of sawdust ever (doing a ½" depth on a ¾" board) and that took four separate opening to clear it out during the carving process. for this I used my much smaller Shop Vac. It would have been great if the JET could have been attached to do the job.
Bob Hill
Tampa Florida