Originally Posted by ben322
now I have a 3-point belts in the second row.
You also have the Toyota LATCH point anchors for a baby seat, which is part of the reason I bought a pair of those same seats off of ebay about six months ago, but I have not gotten around to tackling the project yet. Congrats on getting yours in. They look great! I was worried that I would need to have an upholstery shop make some skirts to go around the bottom of the seat to conceal the hardware but after seeing yours I don't think that will be an issue.
Can you point out your brackets on the pic you took of the underside? My seats are in storage so I can't look at them right now for reference but my idea was to remove the Toyota mechanism and make a bracket out of a piece of 1/4" steel L channel that would bolt to the bottom of the seat where the factory Toyota clamping mounts were (it clamps to rails in the floor of the Sienna) and bolts to the existing pedastal base in the Interstate.
Am I understanding correctly that you eliminated the fore aft sliders on the Interstate pedastal but kept the pivots?
Thanks for the inspiration to finish my project!