Does sound very interesting, look forward to seeing the finished product. There is definitely a gap in the market for this, as an Aquadaptor is just not ideal, having to pull the pole hose every time you want to cut the flow.
I think the aqua tap looks like a good idea, but the downside is having to have the brush against something to allow you to twist the pole to turn it off. Pulling to aquadapter is really easy, you hand is usually at the bottom of the pole anyway, it's so quick. Have you tried an aquadapter Tim?
No I have not Lee, in case of the aquadapter I do not want to use equipment that trades one downside for two more. Again, Peter's device looks like a step in the right direction, but again, like you say it looks like there is a downside of having to have the brush against something to turn it off. I would have to try this in real life to see how I would cope with it.
The reason I don't use an aquadapter is that it's more weight, especially being at the top of the pole, taller closed pole, more awkward operation. I don't understand why anyone would want to move one hand to grab the pole hose to shut off the flow? To me it's incredibly awkward. That is, if you are used to pinching the hose or using a trigger. It's a major downside. The device performs well that it shuts off the water, but it's got too many downsides.
When it comes to the actual control over the water, pinching the pole hose is effective.
An actual device that comes nearest to an ideal is a trigger, that gives you split second control of the water, and you don't have to move your hands.
Of course, there is a downside to that, the loop in the pole hose. But it does give you the option to grab and drag the actual microbore around corners, without having the stretch or tangle of a pole hose. A pole hose tidy doesn't weigh much, and allows you to keep the pole hose off the ground, reducing wear. There is a little bit more weight on the pole when using it on downstairs windows (the pole hose being on the pole), but when extending the pole, this disadvantage actually disappears completely, as the pole hose goes up the pole. Again, it has downsides, but I consider it to be better then a tap or aquadapter.
In short, what we want is a device that cuts off the flow without having to move your hands. I don't yet understand exactly how this tap works, but it looks like it at least achieves that.
The other big issue is that of the pole hose. If you really think about it, it's useless. It drags over the floor, collects dirt, wears the pole, it stretches when pulling around corners, it can get punctured more quickly.
The future is a pole that doesn't use an external pole hose.