All that's left is mounting the antenna to the tail. The directions do not give advice on where or how to do this. Anybody with Four Star build experience, please help. Don't know where to poke a hole through to get it up.

I drilled a hole on the bottom right behind the wing mount, inserted a piece of fuel line, ran the antenna out through the fuel line then took a T-pin and put it in the fuselage as far back as I could. I put a rubber band over the t-pin and stretched it a small bit, ran the antenna wire through through the rubber band and tied it, then let any extra antenna hang out in the wind. This setup has been in place for over 500 flights with a single problem. The rubber band allows the antenna to give a little

If you used a different tailwhell such as a sullivan then just wrap the rubber band around the mount for the tail wheel. You cannot do this with the stock tailwheel

You could also run it out the top by drilling through the former right behind the canopy and shoving the T-pin in the vertical stabilizer

I like creting an antenna tube by joining several soda straws end to end (slit the end of the "internal" straw) with CA, then CA'ing them to a lower corner of the aft fuselage and running the antenna down the tube. Cheap, light, invisible, effective...

If the antenna length is excessive, I run the extra out a hole in the lower aft fus side, clear of any control hardware...

i just went to the hobby store and purchased an antenna tube (comes in 36") for about $0.50. installed it right in the middle of the fuse exiting right before the tail wheel - i prefer the cleaner look of having the antenna routed inside the plane

Is it critical that part of the wire hang outisede the fuselage?

Not at all.

Most of my 50CC planes are to long to get the wire to the back of the plane, plus most all have some sort of tube in the fuselage. I have seen planes that got better range checks with the wire on the outside. Usually this is caused by the extensions going to the servos in the tail