Without question, cutting the hearts was the most time consuming part of the whole operation, and the thicker the baits the more difficult it was because the heart cutters I used are plastic and don't have a very sharp edge... but even at that, it obviously can be done.
I told DF that I was planning to do a blue/white star chevron pattern on a frog last year in August (when I was hoping life would slow down) and I was going to call this critter "Evel Frognievel"- the daredevil jumping from pad to pad, but DF got to the star first on the 4th of July... so, the heart was next in the bag of tricks and it was simply a matter of waiting for the holiday to use it. These valen-cores were actually done before I made the Budweiser coach dogs, but the first spots I experimented with were done last June when I was developing the skel-E-core pattern.
Going back a little farther in time, when olsarge challenged me about making a lure with the "bat signal" I thought it would be relatively impossible (at least to have it looking good), but I now know it could be done with this shape cutting method, if a fella could find the right shapes... this cutter method certainly opens up new possibilities.