I made one, as I posted a while back in response to the original thread.
I then didn't use it much, as I was landscaping the garden, but over the last two weeks I have been building a wardrobe which involved a lot of routing and cutting, mainly MDF, and I also used it to clean the workshop floor and bench.
I have made or bought fittings which hook it up to a jigsaw, bandsaw, router, router table, plus I adapted the original vacuum cleaner tools to push onto the end of the hose for general cleaning witin the range of the long hose I bought from Axminster.
Result was 50-75mm of densely packed dust evenly distributed over the bottom of the cyclone bin (it's a plastic 55 litre £5 dustbin).
The first vacuum cleaner bag developed a hole but between it and its replacement I only got, say, four tablespoons of very fine dust.
At that rate one bag would last a very long time, but the paper seems to weaken in use and I think a burst is more likely than a full bag. Maybe the pores in the bag clog up making a burst more likely,
The only siginficant problem is if the hose gets blocked, either with a large and coarse plane shaving, or because I put the nozzle too close to a surface when using it for general cleaning up, the suction is enough to partially collapse the bin to a three-pointed cross section.
After this happened a few times a split developed at one of the peaks. I taped over it and am more careful now, but the finishing touch would be a pressure relief valve which I will make as soon as a spy a suitable spring.
W.