That's pretty neat. I hope that's a little guy who does well in a niche market.
You would think the description of this as a "press fit" is really more about alignment
than amount of force, I wouldn't think a carburetor body would take much crushing.
a threaded rod, through the carb or 3 on the perimeter and 2 flat stiff sheets anything,
even lexan or plywood would seem capable of drawing the carb down square.
Looks like it is a little guy, check out this intriguing 2nd product, nothing is new I guess,
but I never saw this before.. He's putting down force on the heads,
so the engine is under stress to dampen vibrations
Course there is already load from the head and base bolts torque but still,
this could really make you think of damping options.
Shovelhead Antivibration Head Jacks [On Sale]