Any phantom is good in the rough,a lot better than the Frode,I have driven an 18 a21 and a25,the 18 was a bit twitchy at full chat and tended to chine ride,the 21 with bow tank full would cut through anything,the 25 even better again solid as a rock,the Frode 21 i would pass on that if i was you,my mate had one after a phantom,was not happy with it at all,came back to a p18 and the Frode is now lying for sale in a boatyard near blackpool,another thing to consider is selling it,phantoms not a problem,frode you will struggle.