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PhilDAS
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Could do. Hadn't thought of that, I confess, but my initial reaction is a no on the basis that:
- I'm only looking for about 5mm extra clearance, max.
- I'm hoping that a subtle dimple won't be too noticeable whereas that option definitely would be. Although possibly in a 'played for and got' way rather than an 'Oooops, spot the fuck up' way.
- It'd involve more work. I need to make a dimpling tool anyway, so I might as well make a dimpling insert which will squish the chainstays slightly for crank arm clearance.
- I'm only looking for about 5mm extra clearance, max.
Brommers
It turns out that on my new not-quite-finished-but-nearly-there gravel bike frame I have zero or slightly negative clearance between the chainstays and the crank arms. The chainstays will need a wee dimple for chainring clearance, and I'm good with that. However, while my head says to just dimple the chainstays on both sides to allow crank arm clearance, my heart says that's a bodge and I should cut out the chainstays and fit new ones which have sufficient clearance.
Anyone who wants to tell my head that it's right and to tell my heart that it should stick to pumping blood and keep out of framebuilding dilemmas is welcome to say so. Contrary views also grudgingly welcome.