It is certainly an interesting design concept, although, for one wishing to fit their own cartridge, the company could have bothered to give some indication of tonearm geometry, other than the following:
"Longest Arm in the Hood—Swappable in Seconds
Sol features a carbon fiber tonearm that is longer than anything else in its price class—a full 11” long. A longer arm means more accurate tracking—much better than the “baby arms” of other affordable turntables. Not only that, the Sol tonearm can be swapped in seconds, allowing you to easily change cartridges to meet your specific needs." [emphasis added]
I would beg to differ wrt the tracking being more accurate simply because the tonearm is longer. The results will be just as overhang and lateral offset dependent as for shorter or longer tonearms. All the more reason for Schitt to provide some indication of tonearm geometry; and/or an appropriate protractor; a simple overhang gauge even!
As the manual* mentions nothing, customers are left to figure out for themselves that they'll need source a one or two-point protractor. Or, should one be a bit more experienced, one could use their preferred inner and outer null values, along with the easily measurable pivot to spindle dimension, to calculate overhang and offset using the following formulas:
L = sqrt(D^2 + N1 * N2)
D = sqrt(L^2 - N1 * N2) or, the measure of uni-pivot point to centre of platter spindle.
Overhang = L - D
Linear Offset = (N1 + N2)/2
Offset Angle = Arc sin(N1 + N2)/2L)
where:
L = Effective Length
D = Mounting Distance
N1 = Inner Null
N2 = Outer Null
[Credit, where credit is due:
Percy Wilson, 1924/1929 and
Erik Löfgren, 1938]
The above assumes that the particular combination of a straight headshell with straight in-line slots (albeit of staggered positions) actually allow for a standard 1/2" mount cartridge to be angled sufficiently in order to achieve correct lateral offset for a given overhang, wrt a chosen set of null points, without having to resort to a single fastener mounting bodge.
* Shiit Sol manual here:
https://www.schiit.com/public/upload/PDF/sol manual 1_01.pdf