Hello Guitarman.

I've been flying planes similar to yours with similar power plants - several of the 27% GP Extra 330S ARF and I also have the Edge 540 ARF in the same series. Both are powered by DL50s and both required tail weight - around 2-1/2 oz. in the Extra if my memory serves me correct. These planes weren't designed for 50cc engines, thus the nose-heavy situation. Rest assured both of mine fly delightfully balanced as recommended with the tail weight. On my most recent Extra I even mounted the battery near the horizontal stab and it STILL required some tail weight (although I used the pull/pull rudder servo setup instead of the tail-mounted servo which probably would have negated the additional ballast).

Here are some pics of the lead in the tail of one of my Extras.

Hope this helps.

Tim