Marty,
Nice talking to you last night.
The tube market is pretty saturated, so they'd have to be aggressively priced with superior performance. Like another poster pointed out, my knock on most tubes is they're way too hard. Softer tubes, although lighter and less resilient, make for far better hookups.
A tube jig is a go to for me, if you can't catch a fish on a tube jig it's prolly gonna be a long day. My favorite brand is Cabin Creek, but I fished an HSB with Elnut, and they are very nice. Hawg Slop tubes are also good IMO, RedneckSR from this board tipped me to them. 4 inch tubes from Zoom are soft and work great too.
The biggest problem would be distribution. I think you'd have to somehow make them accessible to a lot of anglers in a cost effective manner. If your tube gained some notoriety or some serious ad money was spent, distributing thru the internet could fly. Renting shopping cart based web space is very affordable.
It all comes back to how well they perform. Make some and I'll be a beta tester. Email or call me. I'll give them a whirl, and you some honest feedback.
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