Hi Henry,
If you have laptop/netbook then it might be worth looking at the TB Strobe software
http://www.tbstrobetuner.com/There's a free version which is great for guitar, but for pedal steel you'll need the full version which only costs a fiver (no kiddin'!).
The paid version lets you create tuning offsets (I believe it's called Sweetened Tuning) for every pedal or lever position, which means you can get tuned up very quickly.
The Emmons offsets on the photo below work fine for my guitar, but I'm a newbie and wouldn't know if these offsets are the best.
The first column includes the string gauge in thou's, and the other numbers are the tuning offset in "cents".
I also thought of investing in a strobe tuner before I realised that it's basically a one-trick pony (or should that be computer?), and the clever bit is it's program, not the hardware.
However, If you need a tuner for stage work, rather than for carrying out a full set-up then I guess you'll need something more portable.
Cheers for now.
RichT.

- Emmons and Day tuning offsets