There are other issues with large commercial single group levers, of course. Under-cupboard clearance and the large footprint can be a problem. The Bezzera 1st-line sells is over 19" tall, not including the lever base and lever itself (which could stick out, I suppose). There's also the electrical requirements, though the 120V Bezzera single group is supposedly only 1400W. The equivalent Rancilio model is speced at 3000W for the lower voltage model, which is about 27A. Why would this be preferable over a regular 240V line? Presumably either would have to be run specially.
The Lusso is still looking pretty nice for my original idea of an interesting little lever machine to play around with and possibly keep at work. I recently got a line on a reasonably-priced used unit, which unfortunately seems to have the fit problems with both wands and the manometer you mentioned. It's a little off-putting to think it would arrive that way if I bought it new, because it really isn't a cheap machine, and it makes it look pretty bad. I'm not sure how much work is involved in fixing it, especially since they arms are chromed.



