Nice work on the turret side hatches, a useful addition to the modelling options.
As to the mesh skirts for the J, as primarily a gamer nowadays, I realise that there's often going to be a degree of compromise necessary to make a model for gaming & this is a prime case in point. I'd imagine any attempt at mesh schurzen would have to be overscale (& I'm absolutely ok with that) & pretty difficult to render effectively in plastic. My own attempts in the past have used the fine steel mesh found in cooking splatter-guards & that in fine plastic (PVC?) sieves (I believe others on the forum have already suggested it) with plasticard frames. They are, of course, compromises - any smaller & it gets difficult to not block the mesh with paint, defeating the object - but I'm glad you're continuing to search for a viable way of producing it, good luck!