Pace RC100 - can you use other cranks?

[Sticky Ricky]

I am interested in purchasing a frame and wondered if the pace experts here could give me a any leads.

Also any tips on buying one of these would be appreciated.

One big question is - do they take any other BB and chainet other than a bullseye?

Interested in singlespeeding it with bits Ive already got so would prefer not to haver to use bullseye

Cheers