Hi Darren
This is my first posting to you as I've only just seen your thread. Crikey, you've taken some knocks with all of the postings. Isn't it a shame when you're developing a product that you've got to keep it secret and once you do get a patent you then get the feedback that you could have done with prior to patenting it!
Well done, for persevering to obtain your patent. Anyone that does so, needs a medal in my mind.
I've just developed something and I'm just going through the process of exploring which IP route to take, so I'm a newbie but I've found it frustrating and time consuming already.
Anyway, going back to your shower screen, I feel that you need some support and guidance.
From what I have seen of the postings so far, it looks as if all of those that you approach want to see a working model. I did look at your You tube video, and whilst it clearly shows how your screen works, it doesn't show it for its final purpose i.e raising and lowering into the side of a bath. So this does need to be achieved before you can move on, as it would take some selling in its present form.
Because you already have a patent on the actual shower screen, have you considered having the bath made to go with it, to sell as a complete package? You wouldn't need to get a patent on the bath,as the bath is useless without your shower screen, so they have to be sold together. The two have to function together as well, as you're bound to be aware of.
Have you approached bath manufacturers to find out if they can produce the bath that you need?
If you're able to get a reputable bath/sanitaryware manufacturer on board, its more likely to be accepted by the actual retailers that you need to sell it.
You can PM if you like, and I'll help as much as I can. I'm a Building Technician and my work is predominantly associated with Facilities Management.
Best of luck
Peter