I based this on the JAV-3D version. for my AEG microwave. I probably should have used https://makerworld.com/en/models/1660886-microwave-turntable-coupler as it looks more similar. I got this because the universal glass plate I bought did not fit the shape of the coupler. It also did not fit the  JAV-3D version as it is flatter and the “knobbies” are closer to the centre.
I printed in PLA and TPU so far. but the internet says you must print in nylon, as the hot food will transfer through the glass plate into the PLA. Will go to the garden shop today to get some weed eater string and experiment with it.