I've looked at all the xPachyveria and xGraptoveria on the Crassulaceae site, all have five petals on the corolla.
The other thing I noticed is that, with an occasional exception, the sepals on xGraptoveria are quite short, some reach midway of the length of the corolla with an occasional one reaching maybe 3/4 length.
On most xPachyveria, the sepals reach the end of the corolla, or near to the end, with an occasional exception where the sepals reach midway.
As Leslieray's plant has 6 petals on the corolla, it would appear to be neither of these two genera unless there is an exception.
Cliftoncat, your plant does have 5 petals, and they look to open without a tubular back in profile. The sepals are quite distinctive being quite short, and very 'fleshy'.
These are a minefield, we may never find their true identity but I will attempt to have a good search to see what I can find given what I have noticed.
