Did all that. I am a retired motor technician and have rebuilt countless calipers and have never had this particular problem. Hence my question about piston sizes and seal kits.

Just looking for confirmation of the piston sizes between the ADM and JDM calipers. If they are identical, then its a sealing problem. And it is happening on both left and right calipers, so it is something common.

Think I'll grab the genuine Toyota kits from AJPS and redo them.