Hmm...
Well there is more than one way to skin a cat.
"makes it a breeze to switch tools. twist off one and twist on another"
If you have a male coolcuff at the end of your lead hose, why can't you just slip that on the tool?
Would be streamlined, I imagine the bulk of running a starter cuff in addition to a swivel cuff is just that, bulky at the tool.
Just comments from the peanut gallery.
Also, for your stair tools, uph. tools etc.. you could have one of Joe's reducer cuffs on a whip hose, it makes connecting a 1.5" to your 2" male a snap. I kept a 10' whip that i used with all of our uph. tools cause the mfgs. don't have enough sense to sell them with a long enough hide-a-hose, the extra length is necessary on an L shaped sectional.
Why do you suppose all hand tools don't come with 15' of hide-a-hose? I don't even know why they sell hand tools by themselves, just setting a greenhorn up for failure, gonna drag that hot brass across some expensive fabric.