Hi duncan,
The problem we would have is if people just wanted the pole like some do, they would expect to pay £40 less.
They get a valve !
You should be able to reduce it by something. Surely they cost something to produce

and less than a valve
Now you have people like me, who want Aqua Dapter. Who was original interested in trying a new product, which was cheaper(than SLX) and included Aqua Dapter as a bonus incentive(£50). This no longer is available, but worse. Its now extra.
It just doesn't make sense.
You cant bring a new product out, saying Aqua Dapter comes free, then remove that bonus shortly after it hits the market