I hope to install the anti splat seat mod in my tip up 9. I'm referencing the PDF file included with anti splat web page. I believe the extra 4 inches would really help. I'm 6ft 2in 220 and most of my pax are at least as much. (Excluding my beautiful wife). Have any of you have done this in your aircraft? I have some concerns with clearances of the roll bar and your head once this is complete. Also the clearance with the canopy locking bar and the flap motor. Also the clearance with the locking bar and the seat back.