My seat belt runs along across the front of my body right at my belt line. It seems carrying a rig like the OP’s would put the grip under the seat belt and that the seat belt would push the whole rig uncomfortably into my midsection. Not too sure how a left hand draw would work conveniently. These are probably meant to be more of a set of questions than comments, as I have not researched this particular carry position.
Although it is a common practice, I’m not a fan of carrying different guns in different places in different holsters. KISS. First, I avoid having to administratively handle guns and holsters more than necessary when out and about. I always want to carry on my body. I always want to be able to draw with either hand. I always want the gun secured so it cannot fly around the car in a wreck.
AIWB does all that for me, EDC position in Kydex with a little foam padding. Nothing to change getting in/out of the vehicle. Works with seat belt on or off. Always concealed and secure. Grip is above the belt line and the seat belt. Spare mag at 10 o’clock. Knife at 11.