I promise I would report back when I'd used the vacuum bleed kit.
I used it this morning, before it got too hot!, to charge the fluid on my wife's Smart Car.
As suggested (I think by Mr Cheerfull), a bit of grease) was applied to the threads of the nipples. I cleaned them, applied some grease, (without removing them), around the point where they enter the cylinder. The only, minor, issue, none of the rubber adapters fitted the nipples but the end of the plastic tube did and sealed fine. 'Senior Management' was tasked with keeping the master cylinder topped up as I operated the gizmo.
Seeing the difference in old and new wasn't easy- the old fluid was very clean. But I pumped until I was sure, discarded, pumped some more, and checked what I'd collected with my brake fluid moisture meter.
A final pump the 'old fashioned way' using the pedal and all done, moved to next wheel.
I didn't note how long it took, nor did I rush it, but I'd say about an hour and a half at a guess.
The vacuum pump was about £10 off Ebay. Having done the same job the old fashioned way in the past, I'd say it was marginally easier with the pump.