Larry,
The trend I see now is hardly any guns are coming in from Spain. The manufacturer that put the most on the ground, here, so to speak, has recently thrown in the towel.
I'm told others will be following, soon.
It is nice that the Muslim guns are offered in that configuration. But, I'd be willing to bet bunches of them sell with short tubes, and single triggers.
I suspect the "average" doublegun owner isn't really one of us, Larry. I see few in the field outside of my posse, and most of those I see have a Browning, a Beretta, or a Ruger with stacked barrels.
I haven't met a stranger with a double SXS while hunting in years. At my local RGS fun shoot last fall, two guys had doubles-me, and a guy with a Parker Vulcan NE.
With 26" tubes and a single trigger.
Best,
Ted