I was thinking more along the lines of using a tt shifter as a bar end, or doing some cleaver mod onto a down tube shifter... overcomplicating things I know which is why I’d choose Shimano.
I wasn't suggesting that you have "brifters" now. Just that if at a later date you changed your mind for whatever reason 7800 is going to be old enough to have dropped in price, but new enough to be good, and aesthetically fits.
Tiagra cassettes are sub £20.
I’m a really big fan of the project (it's very similar to something I'd love to do at some point in the future) but as I said you're including some niche parts. 10 speed is not niche, and relative to the overall cost of a custom build, worrying about an extra £20-50 on a chain/cassette seems odd.
I was thinking more along the lines of using a tt shifter as a bar end, or doing some cleaver mod onto a down tube shifter... overcomplicating things I know which is why I’d choose Shimano.
I wasn't suggesting that you have "brifters" now. Just that if at a later date you changed your mind for whatever reason 7800 is going to be old enough to have dropped in price, but new enough to be good, and aesthetically fits.
Tiagra cassettes are sub £20.
I’m a really big fan of the project (it's very similar to something I'd love to do at some point in the future) but as I said you're including some niche parts. 10 speed is not niche, and relative to the overall cost of a custom build, worrying about an extra £20-50 on a chain/cassette seems odd.