Looked at the Equilibrium a bit more and noticed that the standard seatpost has a small layback.
So I put an inline post of mine on, with my usual flite, and the 56 seems only 1cm too long now.
I think that is just my reluctance as a mtber to ‘assume the position’, and when on the drops with the saddle the right height, then the leg angles, the plumb bob line from the front of my kneecap through the pedal axle and the bar masking the front hub are all correct, as measured on the static trainer at Evans in Guildford.
So I bought it – a retail version – as I can’t find a frameset anywhere, and next years ‘might’ be in from August the 10th.
Evans did 10% and 12 months 0% though, so that helps offset the cost of decent wheels and fixing up the 105 bits that are missing, and getting a white flite saddle to match the bar tape…