No, but you're asking a broad question which is best answered by browsing through the Current Projects thread or searching "Raleigh", "Peugeot", "first" etc.
In short, no it's not a bad idea at all and from what you write, you are aware of most of the pitfalls (Peugeot seatposts, Raleigh threads etc) and have a good idea of what to look for.
My best advice for a first time builder: "make cheap mistakes".
No, but you're asking a broad question which is best answered by browsing through the Current Projects thread or searching "Raleigh", "Peugeot", "first" etc.
In short, no it's not a bad idea at all and from what you write, you are aware of most of the pitfalls (Peugeot seatposts, Raleigh threads etc) and have a good idea of what to look for.
My best advice for a first time builder: "make cheap mistakes".