• That BB area looks like a real PITA. Is that part of the reason why old frame makers used lugs, to save labour costs - especially in the pre-Dremel era.

  • Lugs do in some ways make building a frame easier, particularly if you're using a hearth rather than a gas torch, although there are also other reasons for using lugs. I'm not sure less filing was the main reason for using them though.

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