I may trap solo under spi when I have T-foils but I don't, so that can be the cause of our disagreement.



Almost never, that is true yes.

I have the same experience on my own Taipan F16 as well as the VWM Blade F16 by a friend. In both cases, me getting out on the wire bounds up the boat. I guess my 85-90 kg frame is just to much in addition to the other already trapping out.

Last year we did some testing (Ashby sails from easly 2006) and I kid you not. We were both faster and pointed higher with only one of us on the wire (upwind) and the other hiking out.

But please note that we sailed at typically 155-165 kg (they heavy end) and that the sails were cut for 140 kg on his boat and 150 kg on my own boat. There is however something wrong with my mainsail and it hooks too much up top when I pull the leach really tight. So this may give some cause to my experiences.

Wouter