You're right on a number of levels but not all... Do-It lead Molds have been and will likely always be made in a foundry off of a pattern. That's the only way we could mass produce a $40 mold. Machining is espensive snd therego the expensive of coming up with a new design. In order for Do-It to produce a new design and then work it into the already 600 - 700 models already produced... it starts to get complicated.
Do-It would like to be everything to everybody, but the fact is there is only so much we can do. What one guy wants another doesn't... and so on. The reason it exists at all is because a guy decided that he had the experience and where whith all to create his own mold so he and his buddies could make their own jigs/sinkers by them selves etc.(kind of a freedom thing) It was never meant to be a way to "mass produce" jigs for sale but to help "joe schmoe" save a little money making his own baits in his own garage and enjoy it while he was doing it.
This is exactly why you will find that most Do-It Molds are time tested designs that appeal to the masses and can be used by most any "joe schmoe' to make something to fish with. If you want to modify one to do what you want... DO-IT. It's a freedom thing and it goes back a long way.
The "design team" consists of about 10,000 people or so... I'm only guessing. We do keep files and we do pay attention to the market. If you have a good design that you think we should see please let us know but understand... we've probably already seen something like it.