Yeah those radar antenna and side antenna are not durable I forgotten how many times I had to glue it in place. Gorilla glue works better than crazy glue.
Matchbox licensed the SDF-1from Bandai, after they acquired the Takatoko molds. So yeah that is a Matchbox by way of Bandai SDF-1. I Still have mine for three decades.
Well Bandai's 1/48 is an upgraded version of Yamato's 1/48. They probably used (poached) the same engineer to create a upgraded mold for their toyline. Arcadia sure did missed an opportunity to upgrade the legendary 1/48 line.