Mike,
The prototype Ultimate that I have the Extensions for the top wing goes through the bottom wing
and through the struts to the top wing. If this is how yours is, here is what you need.

5 - Futm4147 22in Extensions
6 - Futm4145 16in Extensions
3 - Futm4130 Dual Extensions

If you have any questions give me a call
254-744-9218