I don't have the propeller speed error anymore
after replacing the propellers. I am not using the 3D item after testing it (I saw that it still causes pressure on the propellers, esp the bottom props). But I still appreciate his efforts and it fits really great both for the drone itself and the MM Combo case.
Just to let you know if you are wondering, I no longer face that error. When home, I keep it outside its case in my bookshelf. I store it in the case whenever I drive somewhere and need to take my drone with me that's all. It seems that the error is actually due to the tiny deformation on the props (esp the rear props). Even my local DJI store recommended downgrading my firmware to get rid of that error. I did not downgrade of course. i think if I downgrade I will still have that error hidden from me and will face the consequence by witnessing sudden crash..
I am a 3D print noob so I can't make any update on this product. But would be really, really great if somebody designs it in a way that does not make any pressure on the bottom propellers.
I find it safe to keep them close to each other (not underneath but partly like 8 shape) and don't feel any pressure. If you guys can update this project in this shape it might really save us from spending hours to put it back to its case
Hope this helps.
Best