> but I've found that one of my problems in hills is that I flex the boom. I don't have enough power that I
>can afford to do that.
>can afford to do that.
I'm curious about that. If you don't have a lot of power, I wouldn't have thought boom flex would be a problem. The 'solution' is picking a low gear, with possibly short cranks to assist in spinning - which reduces flex. Even so, IMO, any boom flex is bad.
I put the flex at about 10mm using my static foot on pedal method. My P-38 has no flex and outclimbs my Baron 'Raptor.' A Seiran SL had 8 mils flex and curiously my Optima Lynx has only 8. Most trikes have in excess of 20 mm.
I bought the Raptor on the basis that it would be faster overall than my P-38. I don't think it is - but I'll play with it for a bit longer before I decide whether to sell it. It's 3 kg lighter.