Gotcha - makes sense.
Frank - questions...Do you make changes at the track or generally set it and forget it. What are you using for slip plates. I am looking for a good DIY solution but so far have not found a good answer. It seems the oil between garbage bags has a lot of friction and doesn't slide freely. I'm thinking of grease between 2 pieces of linoleum.
I do make changes at the track. Even when I am at my home track and know the set up to start with there are always minor adjustments from the cold morning to the heat of the day or the amount of rubber on the track Plus I am always checking toe.
For skid plates at the track for durability, went to a metal supply and had 12x12" thin stainless steel plates cut and I put grease between them.
At home on my lift on top of the scales I use one gallon freezer bags with grease in them both work as planned.