I have PF30 BB shell with a Chris King BB fitted with with care and never had any issues what so ever.
If had a new bike built now I would spec T47. BSA is no good for modern frames with OS tubing in my opinion, makes for over complicated mitres, and looks silly.
As far as T47 BB manufacturers being in short supply, I don't think it's really an issue, as I'm not sure why anyone would bother with anything other than CK headsets and BB's on a custom built bike. Yes, they are expensive, but they will literally last a life time if looked after.
I have PF30 BB shell with a Chris King BB fitted with with care and never had any issues what so ever.
If had a new bike built now I would spec T47. BSA is no good for modern frames with OS tubing in my opinion, makes for over complicated mitres, and looks silly.
As far as T47 BB manufacturers being in short supply, I don't think it's really an issue, as I'm not sure why anyone would bother with anything other than CK headsets and BB's on a custom built bike. Yes, they are expensive, but they will literally last a life time if looked after.