I have both 27 mm and 35 mm hoses going to my MFTs. When connecting the 27 to the TS 75, I do see more blow-out coming from the front end of the saw than with the 35. No big deal, neither are perfect, so when the cutting is done, disconnect hose from TS 75, switch CT off AUTO, and get rid of the dust left on the table; I have to do this with either hose.
DrD