Hello Bob,
Yes, I have the Delta Fighter 90, and love it. If you got a BTE cheap and it's in good shape, I know you'll have a good time flying yours too. You may find it interesting to go back and take a look at a previous message from me to you about the setup I'm using, just as a starting point. My engine is a Thunder Tiger while your's is a Magnum. I have no idea how the two compare. You'll want to prop it for speed; a small diameter prop with a large pitch. Assuming you like speed, that is.

One thing to look for is the fuel line being cut by the metal nose wheel collar that keeps the strut from slipping out of it's bracket. You'll find it just below the fuel tank lines coming through the 1" round hole in the firewall. My tank had to be held up 1/4 inch with more foam to keep the fuel line from being cut on that collar. The plane is upside down when you view this area and it wasn't obvious (at least not to me) that the fuel line would be cut by the wheel collar on the gear strut when the plane was in an upright position and the tank shifted downward in the fuse.

You may also want to use more slim wheels to reduce drag. The BTE I saw had big and fat wheels and an old .90 which didn't go very good.

Let me know how it works out. I'm interested in hearing about your first flights.