I've seen that sort of thing in the past, but not that bad. The guy bumped the ruler as he was laying out the slots, and didn't check before cutting them.
At one point I had printouts of all the fret scales from about 630-665mm in mm intervals. I could lay the ruler down and find out which scale had the most frets that matched, and then correct the rest. Some of them seemed to be laid out 'by eye' rather than measurments. You don't see that much these days.
At any rate, I'd consider doing something like that: measure the nut to saddle distance, assume a normal saddle compensation and subtract that, and get the printout for the scale based on the remaining distance. Get a really good ruler, lay it down on the fretboard, and see how close things come to that. If it's much different maybe it's not worh the effort.
I'm still trying to figure out where Kevin got 37 frets.... I see 18 full and one partial.