TOPFLITE1994,
"The only dumb question is the one that is unasked" No one really knows who said it first, but it is true.
Sometimes older TU members forget that sharing our own experiences here, and asking questions when we don't know something, is what this site is all about....shared knowledge. It is how knowledge is passed from one generation to the next.
I know, for me, most of what I've learned about lure making I learned here, for others who shared their hard earned knowledge and experience with me.
Anyone who says everything they know they learned on their own, by themselves, with no help from others is either a liar or a fool.
Modifying a production method to include something like a mesh center is a very complicated and challenging proposition.
Most soft bait manufacturers are not interested in reinventing the wheel if it is too expensive and time consuming.
The larger soft swimbait market is so competitive that having something unique, like a mesh core, can make the difference when it comes to separating your swimbait from the others, and carving out a piece of the market/being successful.
From what I've read here on TU, mold design and production is expensive.
If you're designing a production mold from scratch, and plan to use the mesh as part of it, it has to be much simpler and cost effective than trying to modify an existing production mold.
I fish the top hook Storm 4" shad swimbaits like a jig, letting them fall to the bottom in deeper, colder water during the winter, and then dragging them uphill over the rocky points here in our SoCal lakes. There are other soft swimbaits with different, sometimes better, actions, but none I would drag through the rocks like that. At 35' deep, the bass don't seem to know they're eating a $5 bait.