I just returned the bypass system to Amsoil, should have a refund in a few days. They indicated that they were returning my money for the assembly plus the lost oil from the blow-outs, but we'll see what they do. I've got the credit card company's number handy in case I've got to go that route.
I had purchased the aluminum billet caps from MTM (Oilguard) for $175 to use on the Amsoil install. The Oilguard bypass assembly uses these same caps, so they just charged me the difference between what I'd already paid them ($175) and the cost of their filter assembly ($290) which includes the fittings and hoses. I thought that was pretty decent of them because the filter assembly (no fittings or hoses) by itself goes for $160. I'm already happy with Oilguard and I haven't even got their filter yet.