Did some jibbling of the roofrack and Pino today, on account of the new Pino being a different size to the old one. This included releasing the front seat QR, flipping it forward, scratching head and flipping it back.
Jibbling complete we set off for a pootle. My, I think, this steering is heavy. Pause to add a bar to the front tyre. Not much improvement. Off we go. There's a New! Slightly Worrying! squeak from the front seat, or is from the handlebars? (Pino handlebars run close to and beneath the front seat). I put it down to have loosened and then retightened the webbing straps that are part of the front seat. It goes away. We do more miles, steering as heavy as ever.
Then lightbulb moment. Had I refastened the front seat QR? We stop. No. No I had not. What is more, the part that should be held by the QR skewer was just resting on the frame, with a nice wear mark where the steering was rubbing on it. Reattached it properly and tightened the QR. Steering back as how it should be. We celebrate by hitting 64km/h down the hill into town and buy ice creams.