Mounting a Morini wouldn't be hard at all.
My motor mounts are not welded on. They are a true bolt-on affair.
The beauty of them is that they can be "clocked" into almost any
position of tilt, and can move forward & back or up & down on the frame.
This allows for perfect positioning, and gets the chain slack tug-of-war between
both sides of the jack shaft a thing of the past. The jack shaft mount can also move this way.
It's really a beautiful thing.
Oh yeah, the frame is all DOM Steel. Strong but still light respectively speaking.
In fact, My frame only weighs about 2 lbs. heavier than the stock Stingray frame
and it is much bigger.