Try asking someone who has an s8 sole for one of the older sst style shoes and using it in place of the heel. You often see the pros using this trick. Another thing to try is putting a piece of felt on some Velcro then trying that on the heel.
One thing to remember is cleaning the heel can make the “bite†on the lanes more violent. A dirty heel will usually give a more gradual stop.
I would be very wary sliding on a shoe with no heel as it ruined the Velcro on my friends pair of sst6’s
