My double thumb 715T is my oil ball. My THS is Kegel High Street which is 44', but lowish medium volume. I sold my AT since it had to be polished for this pattern to attain any backend. My 718A is a much better choice for this pattern with the 6A in reserve for slightly drier nights. The 7T doesn't get any use except when the machine is on the fritz.
Gary
Proud Member of the Track Legion
Tag Team Coaching Success Story