I've been giving this some serious consideration, really, and I've come to the conclusion that your (collectively) posts are fun time of having the Yank on. So, I'm just gonna go with that. Hahaha's all around. Good show and all that.
So I got the light barrel, kg1.48 the stamp says but I haven't weighted it yet. Originally on a Mirage Special Sporting so 75cm, no side ribs, liteweight monobloc, and factory screw-in in both barrels. It'll have to be fitted to go on the gun I got it for, but it just happens to snap right on the '84 MT6 so I did that and shot it yesterday. Had a #6 and #8 chokes screwed in. Hit the plate first and both barrels to the same spot, always a consideration with pre-owned items. Pretty nice barrels. But I'm minorly suffering some buyers remorse. I really have no use for them on the MT6 since I just use that gun for skeet now and the original barrels are primo for that. And now I'm not really sure that the Mirage I got them for needs a set of 75cm barrels at this moment since I do have two other 75cm barrels fitted to guns already. So ............. impulse buys can be a bitch.
Balance-wise, I think I'm gonna have to wear a silver ID bracelet that I have somewhere on my right wrist to balance the old chrono when I use those barrels. It's all in the details. You just gotta take care of the details if you want that optimum performance.