Thanks your advise-would rather gain some usable mid range and loose a tad on top end-only real problem on circuits with long straights and we don't have too many of those.
I have a new problem though-have purchased Uni-Pod filters to put on NSR but because carbs are side by side and restricted amount of room, I can't fit the two filters side by side-attached directly to carbs. Is there some kind of 2 into 1 adaptor you can get so you can fit a single pod filter? Even if had angled necks would be a bit cramped in their with two pod filters anyway- I would have thought-looking at it! Any suggestions?