i also believe that this only works for 3d stuff, maybe 4d. but nothing higher, and after experimenting, I can tell you that this doesnt work for 1D either, duno about 2d.
I went and farmed for practice gears, (stage 1-1) i tried this method. Broke around 60 practice gears, till i ran out of cats. None of them got past +7, only like 3 reached +7, everything else broke before that, most broke at +5.
After i ran out of cats, i continued to fort with 0 cats on some practice gears and got most of them to +6,+7,+8 before they broke =/ none +9, but at least i got 2 to +8, and like 6 things to +7
EDIT: lol i just went and extracted all the broken stuff, and got 1 dimly XD