I bought a pair of ultra 3gs to replace my aging Dynaroos, using the same #sole (the slickest) and heal as my dynaroos I can't slide at all so I keep using my old shoes which are really starting to fall apart. I tried to swap the sole and heal (from old pair to new) but sole is just a tad too big so it needs a bit of trimming but that would be a short term solution.
What's the trick to breaking these in, I'm using the slickest sole and it's like wearing sneakers,