AS @PhilDAS says, I think if I find a correctly dimensioned 4130 straight tube I should be able to make it work with some off the shelf headset parts. The trouble with a 44mm HT is that it doesn't leave much room for the rear brake hose to wrap around the steerer.
I asked a Chinese CNC company and they quoted me $220 for a fully custom machined headtube which will just take the drop-bearings. Not crazy expensive once you factor in the cost of headset cups etc. Obviously, it's expensive if you fuck it up and have to order a second one...
AS @PhilDAS says, I think if I find a correctly dimensioned 4130 straight tube I should be able to make it work with some off the shelf headset parts. The trouble with a 44mm HT is that it doesn't leave much room for the rear brake hose to wrap around the steerer.
I asked a Chinese CNC company and they quoted me $220 for a fully custom machined headtube which will just take the drop-bearings. Not crazy expensive once you factor in the cost of headset cups etc. Obviously, it's expensive if you fuck it up and have to order a second one...