G&P Sentry battery and grip question...
 

I'm getting a G&P Sentry soon and I'm wondering a couple of things.

1) will a 9.6v nunchuck fit in the stock? There seem to be mixed reviews on this, but I don't want to spend the money if I don't need to. I'm not a fan on LiPo's, had too many issues with them in the past so a NiMh would be ideal.

2) I would like to swap out the pistol grip for a G27 (Element style) pistol grip, or something similar. Is there one that just bolts on with no modification, or would I have to settle for a mod job on it no matter what I get?

Thanks.