Has anyone added rear 3 point seat belts in their bus and do they work ok with a kids booster seat? Mine only has a lap belt in the back so was thinking about getting a proper seat belt put in, but then I’m wondering whether the height of the back seat will be too low for a car seat/booster? It’s also a plywood bench in the back rather than a metal frame so also wondering about the safety aspect? Hoping there’s a few examples on here for me to see different ways to set it up! Cheers