REAL airplanes all have tailwheels Everything I have is a taildragger, unless it has floats. John Buckner is right on the money with setup. You also have to add a means of steering your tailwheel when you convert, either another control rod from the rudder servo, a separate servo, a spring linkage from the rudder to the tailwheel, or a direct link from the rudder to the tailwheel.

Separate servo, more weight and expence, don't need to go there. Linkages from the rudder to the tailwheel are simplest, but the LT-40's elevator is between where your wheel will be and the rudder. I'd just use a 2-56 control rod, connect to the same side of the servo arm as the rudder and run it out the lower corner of the fuse near the tailwheel control arm.

Going to a tail dragger will really teach you the meaning of rudder control, it's gonna be a lot different than a nose wheel on takeoff.