On the back of the SV shoe the bow is held on by two pieces of aluminum that are part of the shoe. I carefully bent those back to release the SV bow.I used a Dremel to remove the plastic STI trigger shoe from the STI bow. The STI bow had a bit more metal where the trigger shoe was so I had to remove some of the metal to get it to fit into the SV shoe. This was not hard to fit. I then put the SV shoe on the bow and pushed the tabs back in place making sure the shoe was straight. I did not put epoxy in the joint and it has been ok for over a year, but I think that is a good idea. The top and bottom of the trigger shoe is also A bit too tall so some material was removed there for fitting.For smaller things like this I usually do it myself because of the time it would take to get the work done by my smith.
I know this is an old post but does anyone have pics to what this all looks like, I would like to do this to my sti and have heard its easy but I'm kinda a visual learner??