I did have one question. Damjan Zabovnik's Metastretto looks really interesting. I know camera bikes have been forbidden in circuit racing for a long while as their visibility, and the risk of cameras failing means they represent too much of a risk to themselves and everyone else on the track. Your regulations therefore say that the bike must have sufficient direct visibility to race safely.

Metastretto travels with the rider facing backwards, looking forwards via a mirror. Is this forbidden on principle? It seems to place all of the elements in the right place (rear drive, short chainline, front steer, low drag) and one might suggest that with a sufficiently large mirror as well as side windows etc, you could achieve good forward, side and rearwards visibility. And the mirror should be reliable in a way that a camera array might not be.

I appreciate that there's a certain arrogance in talking about going faster than everyone else while riding backwards, at a time when I'm not especially fit and most of my recumbent experience is on a fairly slow trike, but I hope you'll overlook that!

What's the difference in requirements? Is it that you don't try for an hour record when the wind gets up, so their greater sail area isn't an issue? That those bikes only race on big, big ovals and so don't need much steering lock? Or is there something more fundamental?