whats the part number of your stepper motors ?

some thing like this from cnc4you ?

https://cnc4you.co.uk/resources/57HS82-3008B.pdf

with the coils wired in parallel the inductance of 2.5mH
is not too bad


some kits via ebay have motors with an inductance close to 9mH
that will make for a very slow machine with a 36V supply

John