Nick,
I looked into the Fein Turbo III and compared it to the CT33.
The Fein specs out at 126 CFM airflow and 99" water lift while the CT33 specs out at 134 CFM and 90" water lift.
Are you saying that the Fein has stronger suction or that the Fein has better filtration or ???
In my shop there is so much fine dust generated by the tablesaw, jointer and planer going un-captured by my cyclone collector in general wood machining, let alone the stuff flying off the router table, that when I do use my TS55, Domino or ETS150, particle collection through the CT is very much indeed noticeable. I really appreciate what these tools can do for me in reducing dust contamination but my shop is still a mess.
I will have to disagree with you on the usefulness of the variable speed. I use that function all the time to tune down the suction which helps the sand paper last longer, creates a better finish and is much easier on the ears. When using the CT on tools such as the Domino or attached to the Kreg K3, the ability to lower the suction which lowers the overall volume, helps me concentrate a little deeper than when the machines are blaring loud.
Now knowing that you have 2 CT33's, have you ever hooked them in series?
How does that affect overall performance?
I ask only because my $79 Ridgid has 3 times the CFM rating than my CT and find it much more better on the mitersaw than the CT.
Somehow the CT reportedly performs outstanding with the Kapex.
Maybe some green or black magic?