MRMIKE:

Do yourself a big favor and wait until last to install your elevator servos. (As the instructions suggest.) That way you can test balance the airplane and find out just how much noseweight you will need before you cut into the back of the fuse.

You can expect to add at least 16 ounces of nose weight and maybe a lot more. Your completed airplane will weigh well over 13 pounds and I suspect, at 6800 ft., you will not be happy with it's performance. Even with a 180.

Jim