Propagating mint from root cuttings

When I do cuttings in water - if its a long stem I chop it into segments so that one stem becomes several cuttings.

I've been using them for cut stems - I've not really got many left. There's lots of little new ones coming but thought if I could pull out some roots from the pot I may get some plants going without using the top growth?

I'm going to give it a shot a never got round to it earlier.