Slipper spool seems to be working. Tried in front of the house which is very abrasive blacktop and it does not slip under power, although i can turn the wheels by hand in the car. Now i just have to see how well it holds up! By the way this is the first spool i have ever run, we cant run one ways in the series e are doing for RCGT. what should i expect steering wise? I think i read it will have less turn in than a one way and a diff but more exit steering than a diff? Is this correct? Thats kind if what i have been feeling but its hard to tell with out being on the track.