I would go to .020 wire for best results.
Not much difference between .035 and .030. It'd be hard to tell the difference without a micrometer,
[on edit] available wire diameters are 0.023, 0.030, and 0.035. I'd use the smallest available (0.023). If we'd been using mortars, we'd almost be ready for "fire for effect", as we were all over the place with sizes.
