RE: Plane #3 on the bench
Good decision the creased plastic are a failure waiting to happen and I would never use them. Regular pin type hinges will work fine or my choice when I don,t use CA hinges are robart single point hinges not flat hinges. They will work fine in the old slots just buy drilling.
John
Buy the way CA hinges are still an option by abandoning the original slot and make new one near the old if you want to go that way.