I've been wanting an SG43 for quite some time, mostly because it's as close as I'll ever get to a PKM, but also because it would go awesome with my RPD. Has anyone done a semi auto build? Are there any builders out there? I found someone on Gunbroker that charges $160 to repair demilled barrels and they say they test fire and everything, so that seems promising. But how much am I looking at to have the actual kit built into a semi auto?