As mentioned in another message-thread, I just get a JET 1.5 HP
Canister Dust collector (rated 1100 cfm). I need help in figuring out
the best way to use it to capture dust from my table saw.
Specifically, I want to know the duct size that I should use.

I am under the impression that I should use as large a duct/hose as
possible while maintaining air speed to an acceptable level (3500 FPM
or something).

I will remove the two 4" inlets in the dust collector, and use the 6"
inlet directly (the 6" inlet is being covered by those two 4" inlets).
Starting with this 6" inlet, this means I should decide on whether I
should use 5" or 6" duct/hose.

I want to put a dust hook at the bottom of the table saw, and another
dust hook on top of the table saw. According to a dust collection
book, I should use a 6" dust port at the bottom of the table saw if I
want to do heavy duty cutting, such as doing dado. I will do dado, and
I will do dado on MDF. Seem like I should put a 6" port at the bottom.
And I am under the impression that I should use a 2" port to capture
dust on top of the table saw (right over the saw blade).

I want to increase the efficiency of dust collection by moving the
dust collector as close to the table saw as possible, and use a very
short 5-ft flex hose (that is smooth inside) to connect the dust
collector to the table saw.

The problem is that the combined size of the 6" and 2" dust ports in
the table saw will exceed the size of the 6" inlet in the dust
collector. This seems to be an imbalance. Will this cause a
bottle-neck at the 6" inlet in the dust collector?

I am also thinking of getting around this potential problem by using a
5" dust port at the bottom of the table saw instead of a 6" dust port.
But this will be against the recommendation stated in the dust
collection book. I am wondering whether I can use a 5" dust port for
dadoing if I can use a better dust hook, such as one that encloses the
saw blade instead of enclosing the bottom of the table saw.

Thanks in advance for any information on this issue.

Jay Chan