I pretty much followed Gurt's schematic.

I left about an 8" lead coming from the TH by cutting the pipe there. This is where I installed the check valve. Coming out of the check valve, I had another short lead, then a Y. The main leg went to the check valve, one end to the vent of the IBS, and the other to the port on the bosworth for when I don't want to fill the IBS.

At least i think that's how I did it. Again, I followed the very good schematic that was posted.