Did the install today. We pulled the cover off, marked the area of the gel pad. Cut the section out 3/4" for the gel pad, inserted and recovered. We cut the section out slightly larger than it would have needed but the gel pad stretched nicely to fill the contours. The Large size gel pad fit perfectly and no trimming was necessary.
Here's a shot of the base with the cut out:
Took it for a short, few miles this afternoon but it sure feels good. Need to run a few tanks full of gas out of it for the final determination.
