Howdy
I just love it when somebody who clearly does not know what he is talking about continues to argue, just digging himself into a deeper hole.
This has already been explained to you.
This revolver was designed for the European market. Probably a lot before you ever heard of a Cap & Ball revolver. It was designed for a market that does not allow civilians to own cartridge revolvers. Uberti simply designed the revolver to look like a Colt Single Action Army because that is the most commonly recognized six gun in the world. So they came up with a revolver that looks like a SAA, but is in fact a C&B revolver. The folks who were buying these in Europe were not put off by the fact that there is no loading lever, they wanted something that looked like a SAA. Of course there was no provision for loading it in the field, that is not legal most places in Europe anyway.
A number of years ago, this revolver started being imported into the US, but it has very limited appeal here, because, as you state, there is no loading lever and most folks here who want a gun that looks like a SAA go ahead and buy a cartridge version, such as an Uberti Cattleman or a Pietta copy of the Colt. One would assume from your logon name that you know something about Pietta revolvers.
The bottom line is, this particular revolver does not sell well here in the US, for obvious reasons, and no company is going to go to the expense of redesigning a product that has a very limited market.
The illustrations provided should make it clear why the frame of this revolver is not a good candidate for adding a loading lever, besides the fact that money would be wasted in the redesign. Products don't just get altered for free, there are always costs involved with any design change.