-
Such a shame that happened, it was a really nice build.
I agree on comfort over weight for enjoyment but it still needs to have the potential to feel a bit lively. The Condor is super comfortable but just doesn't really make her want to jump on the bike for fun. Speaking with Sigma they don't think there's much difference in weight between the ali and carbon Diverge frame. Full bikes can be had for around £600 with vouchers so that would leave change for some weenie bits. The stock low end build is 10kg so maybe 9kg is more realistic with her kit but it's still significantly lighter then the current build. She's gonna try the geo on the Sigma jig and we'll go from there.
I went through pretty similar issue couple of years ago. My assumption of light = fun was wrong.
She was most happy on a custom bike that fitted her well and had a singular(ish) purpose. She was also faster on this heavier bike than a lighter one I got her (a 48cm CAAD10). Shame that Talbot ended its life under a mini-cab.
If you are still set on building one yourself. 8kg with disc brakes is hard on a budget.