Let me take a moment to say this about that !!!!!
Number one, I don't understand anyone buying a Festool product without either the Ct-22 or 33.
I have a CT-22, I love it, and have never purchased a new bag. (Make that used) I have a large vacuum system in the shop, used primarily for a planer, however when I need to clean the bag I just pulled out, placing a 4 inch hose over the inlet, shake it about a bit, place it back in the CT-22. that has been at least 10 times since I purchased the unit. Very strong bag. Remember the two downline filters are the HEPA filters.
This would work just as well with a shop vac, maybe a bit slower.
I do not have a CT-33, however it is enough taller than it would be cumbersome under my MFT and the temporary table that I use for cutting for cutting 4' x 8' sheets.
This beats any of the aforementioned bag savings.
With all that, I'm gone fishing.
Lynn