I have seen the PDF and at first sight, there are no things that are really odd.
But there are several questions.
Why do you want a custom built ? Do you need it, any particular reason?
What do you want to do with it?
Fixed gear on road, track racing, on ly training.
Disciplines? It can make a difference is you ride match sprint, pursuit, kilo, 6 days or derny races.
Does your body ask for custom sizes?
Some freaks want a different frames for each discipline, even for each track (I remember a guy named Paul McHugh, who got new frames for almost every race he did). Most pro racers (world class) use OTP frames. Best bike builders like Corima, Look, Bike Technologies don't do a lot of custom frames.
In 99% of the cases an OTP will suit you perfectly. Differences with custom built frames cannot or hardly be noticed. It's mainly a psychological thing (however, nobody will admit, most people are convinced that the really CAN feel the difference).
Everybody with a bike MUST reed Mike Burrows' book Bicycle Design.
I highly recommend you this book, when you're thinking about a custom built bike and if you question what the effect of frame geometry may be.
thanks