Dan, If I could not get 30 up and 20 down, I would want to know why. There may ge another problem of which you are not aware. Did you build it to plans or some other design? Are the controls binding somewhere? I think you should at least know the reason and then you will have to decide to fix it or that you can LIVE with it. Remember this is what will be giving you your flare on landing.
Having said all that, I really do not remember ever pulling all the way back on the stick. I have pushed it all the way forward to keep the tail off the ground for as long as possible. You will have to take that for what it may be worth and remember that your results will vary. There is a time for building and a time for FLYING and the time for building has expired. See N64KR at http://KR-Builder.org - Then click on the pics Daniel R. Heath - Columbia, SC See you in Mt. Vernon - 2005 - KR Gathering