You got a good price. It flies well. It is a favorite of mine. I've been flying my current one for about three seasons.

I had an OS 46 fx on mine for a while. Then tried a Magnum 60 with a 12x8 prop. It flew OK with the OS, but the Magnum really improved the performance. Altitude here is 3500'. Here some things I did to mine:

1. Put a layer of thinned epoxy on the outside of the firewall for fuel proofing.
2. Put some epoxy on the internal firewall/fuselage joints.
3. Arrange the fuel tank so it can be removed easily. I have had two different WM tanks leak around the rubber stopper. The screw apparently vibrates loose and needs to be tightened. I think there is an RCU thread about this.
4. I joined the wing halves as per instructions. Did not glass the joint and haven't had a problem. (I don't fly 100 mph though).
5. I agree with Cyclic's comments about the gear. I fly off a heavy canvas strip (not grass or concrete). Just check the gear after each flight to be sure they will still pull up into the wheel well. If not a minor hand bending generally fixes it.
6. I didn't use the wheels that came with the model. I put some heavier balloon wheels (forgot the brand).
7. If you have a computer radio, try using a flaperon (airbrake) setup for landing. It helps a little bit.

Enjoy!!