how build a pedal steel guitar?

The problem with that site listed by Slowpoke - it has no information about building a PEDAL steel guitar (that I can find). Links are for building a lap steel which has no moving parts and is exponentially simpler/easier to build (and play). There is really precious little about PSG construction available online. What is available is several generations behind in terms of modern changer mechanisms.

Slowpoke4 years ago
Have you seen just what is in these things? OK, they're not as complex as a piano but they're getting close. Lots of mechanical gear inside. A kit may be easier.

Try this site.

It may help. Let us know how you go.