John - that test tank sounds like a good idea, at least you can mesmerise them with the action. If you can't sell them there you would have no chance here, I keep telling them we (Australian makers) are in the dark ages here and I just get ignored for the most part - even my little 3 1/2" swim bait is an oddity, although I think something bigger, say 5-6" would be a snack for a Murray Cod (up to 100 lb) which have not trouble cleaning up a large Carp, but lure makers here seem to be stuck in the eighties, "it works so why change it".
Another problem we would have here and I am sure there, is everyone would be thinking nice lures at $50, now all I need to do is swindle another $50 off the misses for a rod to cast it, and this is where his fantasy stops - maybe make some smaller ones, and like you say a test tank would be a good way to show any of your beauties off - There is some things you can do to shorten the work time taken in making these smaller 'swim baits', you may have simplify the hinges.pete