Can you please explain how you cut the foam in the seat and made it still "tight? Or is the seat skin floppy now?
I trim the foam from underneath (side that hits the plastic pan) because it is really difficult to smooth out the foam on top. I replace the top vinyl, marine grade and look for something that is not 'slick'. There are sites that explain replacing/cutting motorcycle seats.
Its about a six inch drop from the passenger to the driver seat. This increases the forward slope and your inner thighs give no support while seated. I compensate (which is what I wanted) by moving around on the seat. I can ride it like a cruiser or sportbike, to me, the worst position (in town) is the prairie dog sit-up front position. I feel like I am jammed (arms) to far forward. I am 5'7" in shoes with a 30" inseam.
IMO, safest and maximum driver control, your arms should NOT be holding your weight. You have to unload the weight on your arms (time) to make quick control adjustments. At times I do place weight on my arms just to change position and feel (not in town).