Donhou Build - Continental inspired

I'd build the frame to take a 395mm axle to crown fork, and the head tube to accept tapered forks. That allows you to choose any modern CX fork, it's only an inch longer than a road fork and you have more than enough room in your stack height to accommodate that, and it will give you mudguard clearance even with big tyres should you be moved to go off the beaten track. 3T Luteus looks nice, and at £250 cheaper than WoundUp too.

Tester, if I was to copy and paste your comment and send it to Tom would he be able to put what you are talking about in to practice considering the tubes are probably already in the workshop? I can't pretend that I fully understand the practical aspects of what you were suggesting but from what I do understand it seems like a good idea.

The Luteus does look nice, and given the saving over the WU if it is not perfect there will be a little left in the back pocket to experiment.