When the new insert was cleaned up a bit I shot a bait using each of the inserts and then did a cross section cut of both so ya'll can see the difference in tube thickness without adding to or deviating from the original bait's dimensions.
Tubes done using the newer insert will be tougher on the hook, meaning they won't tear off as easy. I was able to slip a 1/4 ounce tapered tube jig in the thicker bodied bait with no trouble after giving the jig a little spit. Making the new insert took me maybe an hour but then I had to start from absolute scratch, cutting the metal stock to make the jig, cutting and notching the wood base to hold the metal jig and then all the drilling and tapping. The drill press has been etched as has the wood base so set up in the future will be a snap.
No center punching is required when using a jig like this as once its clamped down and you drill the first hole, the 1/4" one to hold the bolt, everything is centered based on that first drill. Pop the belt off the drill press pulleys and chuck in your taps and have at it. The drill press and taps are a sweet way of doing this. I ran a nut up on the 1/4" bolt and snugged the nut to the underside of the angle iron to keep the bolt from turning as I tapped it.
Anyway....Nathan here's my answer to your needing, or wanting, a thicker bodied tube bait. Enjoy!