Well, I have a wealth of information. I had a nice exchange with LS corporate and my dealer spoke with his rep. So... these are quality machines. They are made by radtechnologies, which acquired Bervac. They are out of Quebec. They are the same company that makes all the Kubota front end blowers. The manual pages I saw are the exact same format and language as my Kubota's manual. The mating subframe it the same (and is patented). I was given many additional pics from corporate. Excellent service.
After seeing the specs/build and knowing how much I've put my 50 inch Kubota BX2750C through, I am highly confident in these machines and their quality. I have had to so some minor repairs to my blower that involved the drive shaft. Two spring pins sheared-that was an easy fix. And then once the weld on a sprocket failed--the sprocket teeth were spot welded onto the drive shaft that turned the chain. Now they are welded completely around the drive shaft.
Gravel can chew up some machines if you don't have the skid feet set correctly.
Anyway, the 74 inch is coming in at near 700 pounds. The ship weight is 854 lbs but I suspect some of that is the subframe mount.