I had to at least give it a try. Pretty tiny working venue here. A NEW sharp X-acto blade was called for to do the trim work after injecting the color shift plastic. And GLASSES.

Had waning natural light for the picture hoping that the color shift would show well on these Bubba baits and in some it shows ok. I may try another picture in the morning and if it is a better one I'll edit it in here. EDITTED IN THE NEW PICTURE. I was lucky with this picture in that it shows not only the blue but the purple in the same shot due to the shadowed area at the top line of baits and brighter light on the lower run where the blue is still showing. This doesn't happen often and it couldn't have been more opportune than with this little bait. This picture also illustrates who light plays on the color shifting pigments. The bait at the lower right is in the most direct light and "just" shows a hit of blue. The next bait to the left shows slightly more blue and so on with the lower baits with that one furthest left showing the most blue. Those on the to of the runner show the purple the best because of the reduced light they get and again those to the left, the ones in the best shaded area, show the best color.
I used a .030 wire that spanned the mold's vented side's cavities. Darned small wire was needed for the very tiny gate on this mold. The clear with Delta color shift shot right in no sweat. I needed to heat the black to about 380 for it to be fluid enough to go thru the core created by the small wire but all in all it was a success.
So.....it can be done. I'd assume that two color Bubbas can be done in this fashion fairly easy if one has the time to commit to the detail cutting. The color shift again adds another whole new dimension to another tiny bait.
In this picture I have shifted the baits top to bottom in basically the same light and played with their orientation to the runner and you can see how small changes make a big difference in the appearance of the bait's colors.
