Good luck .
As for the box, you'll start to realise there is a "gap" in the market. OS set, maybe, but a few guys on here have busted them with sub 500 kw atw, let alone the 5 million you're gonna make with that thing! Whatever the direction, it's $$$ and lots of it! The 1-4 PPG helical dog set is prob the cheapest way out.