I am adjusting a ventisit seat pad from an M5 large seat to fit an Optima Baron Large seat.
I untied the ventisit and placed a template of the new seat inside it.
The Baron seat is wider and shorter than the M5.

I am unsure of the best thing to do as the overlap is different. There is now a 4cm gap between the ends of the underneath layer.
I do prefer thinner seat pads to thicker ones, so one layer in the middle of the seat pad is fine for me.
But what might be some ways to cut and tie the Ventisit?
Thanks for any help about this.