My 2c worth, it's your gun and if you want to tube it - go for it. As you said, it's a field gun to be used, not collected. I have both fixed and tubed SxS, I prefer fixed, but see nothing wrong with tubes. Sometimes they can add real versatility to the one or two gun owner. Thants MHO.

All the best!!

Greg

Gregory J. Westberg
MSG, USA
Ret