As published, the tables were for lathes with 16 t.p.i. and 1.5mm pitch leadscrews, as that covers the majority of mini-lathes. Some mini-lathes have 2mm pitch leadscrews, and extra tables for such lathes are included here.

Note that these are not necessarily practical in all cases, and a few variations have been found that work better (usually swapping the order of gears to avoid clashes). The tables have not been amended to reflect this, but should provide a good starting point for anyone wishing to use a 63-tooth gear to convert between metric and imperial systems.