Maxey, I went to a MX8 last Sept. that was a former full and full trap gun. Wanted to tube it but would have only had .005" metal left between the barrels and chose not to do so. Had it opened to .020" and .020" and have shot registered sporting with it that way. I thought the close-in fast targets would give me a problem but it has not turned out that way at all. I have shot the best scores ever with these fixed chokes. I punched up to A class last year and have since shot some scores in the 90's, even one 95. These were on average difficulty courses, not fund raising charity shoots which are usually set very soft. Don't be afraid to go as tight as .020" (mod.), you can always open them a little more if you wish, but it's tough to put metal back.
My SC S x S is a 32" Fox choked .020" right and .025" left. I will never knock tubes, it would be ridiculous to do so, they are proven to be an advantage at serious sporting, but there is definitely a "freedom" that comes with not fussing over chokes for each station. I find myself focusing on the targets much more intently before getting in the box. Again, this is not to say that you can't do both, just that it was an unexpected benefit for me.
Good luck, Stan
