I recently received my shipment of Maru 4x4's for my store (thread will be updated soon.) I really really liked it however the core came out of misalignment...like reported by many people. I noticed that one of the center-pieces already had the "small internal pieces" attached to it. I then thought about the fact that that mod only prevents 66% of the core misalignments. To attempt to prevent the rest of the lockups, I tried the rest of the 6x6 mod. Two of the 4 sides in adjacent to the side with the internals attached use rivets. For this reason, pins can be glued into them. I am currently allowing the glue to dry and will report back tomorrow with the results. What do you guys think?