OBA Setup Questions

I've been reading a lot about OBA setups and have been thinking about it for quite some time now. With the buildup of my D44 looking like I'll be using an ARB Locker or Teraflex's T-Locker, I will need a source of air. Well today I picked up a Thomas 405ADC38/12 from a freind and it looks like I could run that and be alright. Anyway here are some quick specs on the compressor:

Type - Piston Air
Voltage - 12VDC
Max. Continuous PSI - 100
Free Air CFM @ 0 PSI 0.79
Free Air CFM @ 10 PSI 0.75
Free Air CFM @ 20 PSI 0.71
Free Air CFM @ 30 PSI 0.63
Free Air CFM @ 40 PSI 0.56
Free Air CFM @ 50 PSI 0.41
Free Air CFM @ 60 PSI 0.38
Free Air CFM @ 70 PSI 0.36
Free Air CFM @ 80 PSI 0.33
Free Air CFM @ 90 PSI 0.27
Free Air CFM @ 100 PSI 0.24
Length (In.) 7 1/2 , Width (In.) 4 1/4 , Height (In.) 5 3/8
Cylinder Material - Aluminum
Cylinders - 1
Motor Type - Shaded Pole, Thermally Protected with High Torque Start Winding
RPM - 3450
Sound Rating - 63 dbA at 60 psi
Duty Rating - Continuous Duty

Alright, I know that 63daA might be alittle load in the cab, but I can live with that. I'm trying to do this whole setup for under $100 (short on cash) with a tank. Anyway here are my questions:
1) Even though it is a continuous duty compressor, are the CFM rates to low to be considering this to be used for OBA?
2) How about an air locker application?
3) Is a 3-5gal tank do-able with it or should I shoot for something smaller (suggestions)?
4) Would you use it?

I've had a Thomas 315 (sub $100) compressor since around '90. Firestone used to sell them with their overload air bags. It's only a 33% duty cycle and I believe the flows are real close to what your looking at. I just did a quick search and didn't find much flow info.

1. Don't expect to win any races airing up tires.

2. Keep the tank small. Tank size isn't really going to matter. Air lockers need enough air to fill the line. Even a 3 gallon tank will be empty part way through one tire so that doesn't even matter. The smallest I've been able to find lately are 1/2 gallons.

3. You don't really want to shut it off at it's maximum pressure. Thomas says 100 psi maximum intermitant so you want to shut it off below that. I don't know about Tera's lockers but ARB's need to have a max around 80 psi. You could just shut it off there and not worry about a regulator.

I would use one if given to me and I couldn't pay for something better. Mine is used for air lockers and airing up tires at the end of the day and I got tired of taking 30 minutes or better to air up. I just did upgrade to a Viair 350 though.

I like these style of shut off switches. I run it through a relay even on the small compressors. I used to see adjustable switches like these also. This one shutting off at 105 probably won't work for you.
http://www.streetbeatcustoms.com/ezs24544.html

Tank:
http://www.streetbeatcustoms.com/artf9125-sy.html

Air line:
http://www.streetbeatcustoms.com/airline14inch.html

Fittings:
http://www.streetbeatcustoms.com/airmanagcomp-fittings.html