Finally got to installing the QD, it really helps with hose management due to the stiffness of those hoses. Couplers came from McMaster w/ 3/8" barbs.

Now the pump-to-head hose sits coiled on top of the pump and the foot pedal-to-head hose is just hanging off the end of the SYS/MFT cart with the pedal itself nestled out of way underneath next to one of the casters. I can grab the head unit, click-click and I'm in business.
Great tool but the fixed hoses are awkward in a small work area.
FWIW I'd like to make up a couple extra pump-to-head hoses (QD @ each end) but I'd like them to be more flexible. Any opinions on the best type of hose to use? I'd prefer to not use the push-to-connect tube since it's so darn inflexible. I'd like something similar to a good air hose 3/8"-ish.
Is hose rigidity necessary to prevent them from collapsing with the vacuum?
Also, any idea what the ID is of the Festool hose? I had a bear of a time getting 3/8" barbs into it, but 1/4" seemed too small. 8mm perhaps?
Thanks,
RMW