Any designer here?

There are many kinds of designers. I have and do design web sites, graphics and that sort of thing. I have also designed a semi-soft but rigid transport bag for shipping bicycles via plane (but since I do not yet have a patent will not describe this further.) I have also designed a whirlpool treatment tub for my father who requires this for his leg, and the units I have seen for sale all were several thousand dollars, mine cost about $45 but if I had had to buy the wash tub it would have been about $65 I guess I think of myself as a problem solver more than a designer.