Really enjoyed the vid, I have a Cold Steel Natchez with a Southern Comfort, but I'm afraid that's just too much knife for me to carry IWB. If it was the old days when guys rode horseback and carried openly, not a problem.
What length is the blade on your Bagwell? I am thinking 8 inches would be 'do-able' in those sheaths. I have Bill's book and I know he says 9.25 inches is about optimal for a fighting bowie but that's a heckuva lot of blade to stick down yr pants.
The other thing I commented about on your vid is sitting in a car with bucket seats where you tend to sink into the seat and the wings interfere with your blade. Do you find that possible with this sheath system / blade length? Or do you just take the knife out when you in the car?
I must confess I have a full size 1911 (Colt Series 70) and I find that easier to carry than a big blade but I do love those bowies.