If your engine comes down to a reasonable idle and you have not inadvertantly set the idle trim to high then try the next larger diameter (one inch) propellor with reduced pitch (one inch).

Using fuel line or grommets squeezed aginst the nosewheel between some washers or something alway work great for a flight or two then it or a plastic wheel will just burn up.

Another little trick is to reflex the airlerons if they are strip type ailerons. On a single servo aileron set up you can just adjust the clevis on the pushrods out a little so the trailing edge of the ailerons are both just slightly up at the trailing edge from the wings trailing edge. You may find this helpful in making a controled approach a little easier without affecting the rest of the flight envelope all that much.

And finally learn how to slow an airplane for the appoach rather than just a dive to the runway. Sometimes just slowing down and trimming a little up before the approach will help here.

John