Looking at my pop top there seem to be a difference in side wall shape. Down at the bottom that sits in gutters the pop top has a molded step and the rear rack section is straight. I've seen a few that match with the step and the rubber seal sits on them but why do you recon mine is different.
This one has a step
This one is straight
can someone shed some light on this :?
This one has a step

This one is straight


can someone shed some light on this :?