Alright. I really liked the looks and thought about it, so I just had a closer look on their website.
Unfortunately, this piece fell though for me when I learned that the price is only for the modifications and not a complete firearm. You will have to send in a G42, and in the end this will be closer to $1,700.
The second let-down seems to be, that no internals will be changed, exchanged or upgraded. They write on the product page that aftermarket triggers can be arranged, but I can't choose any options right there.
I have to agree, at that stage its just a nice looking slide and a stippling job.