Well, if you have heavily modified a set of guts, then why not just make your own set of guts?
You see, the problem lies in what one man calls "Heavily Modified" and in what another man calls "Heavily Modified".
One could actually be HEAVILY MODIFIED, and one could be just trimming the flashing off the original guts.
Don't think for one minute that guys don't do this kind of stuff all the time. I used to make and sell hand made tone boards for predator calls. They were made off three of my jigs. I had one guy mold them, and sell them to a competing call making supply store. He even went so far as to mold one of my acrylic call bodies.
I had another call maker order one of each of my hand made tone boards, and then mold them for his line of calls.
Once you open the door, and condone this kind of thing, you will never get the door closed again.
You're young, and you haven't been around the block and beaten up by these big companies. But I have a call right now being produced by Knight and Hale that is an exact molded copy of one of my original hand calls.
I'll say it again, if you have heavily modified someone elses guts, then you have the skill to make your own. Don't screw yourself or someone else by "cheating" and taking the easy way out. In the end, no matter what you do, your calls will always be known for having someone elses modified guts in them, and you will lose customers because of it, and more than likely a lot of respect from some call makers, especially the one whose guts you molded.
AL @ THO