Yes, you can do it, and you can also add a small silicon cylinder at the end of the coil to have some
extra dampening.. about the nose heavy CG it is very common to happen in Roos, but it is not worth
to put extra weight on the rear. Just add a little more deflection on the elevons...(about 30 mm) and about 25% of expo that you will be able to hold the nose up in the landing for more time, getting rid
of the hops, like Carlos cited.


Enrique