i know this is a long shot. i have some shimano tiagra cranks i want to use to get my bike going again since i nicked the others to put on my new build. anyway does anyone know what size bb i would need to at least get a decent chainline. the crank is a shimano tiagra and the hub is a condor home brew, spaced 120mm.
cheers.

depends in part on your rear hub, but odds are that a BB somewhere between 107 and 111 will get you in the right area.

I ran a sora w/ 110 and that was good chainline -/+ 3mm

a 107 or 110 UN-53/UN-73 will give the same chainline.
run the ring on the inside and you'll be within ~2mm.
good enough.