$$$$$$$ - if you've got it, go for it. They are amazing guns. I think if it were me though, I'd go all in and get one of their custom guns instead of a conversion.
Don't get me wrong, I'd love to have one. Just can't justify it when my current slug gun will shoot 2 inch groups at 100 yrds all day long. If I let someone else shoot it, that sometimes goes down to an inch. :-D