this for the 'neutral ' readers here that have stuck with the thread (despite all the petty BS )
For anybody interested in trying to get a bit more sideshore performance out of their boards .... K4's AI incinerator fronts are a really nice 'halfway' house in plan shape - between say Ezzy assymetrical flat inside fin (full surf style) , and stock fins .... I got hold of 3 sizes - 9's , 10's , 11's to pit against my go-to Ezzy 3 deg fins (for straight boxes ) , or the 1 deg Ezzy (maybe for flick/quatro customs / boxes with 1.5 deg toe built in) ....

They have a 70/30 foil .... Im finding them basically as good as the EZZY in full side off DTL .... they hold very similar (I take an AI front 1cm more than say Ezzy - as template is longer but narrower ) - so you have 9cm hold say vs 8cm Ezzy , VERY similar off the top ...... they're a bit stiffer than the Ezzy .... but also .... Im finding them really really fast upwind angles ..... So would be a really nice plug and play option for side on also ...
Anyways - they would be amazing option to have a few pairs in your bag - if your home spot suddenly goes surprise sideshore , or you travel somewhere with DTL conditions , and maybe then working in side-on as good / if not better than 'stock' fins ...
I like also the idea of narrower base (vs Ezzy) for quad use - little bit more free flowing area around cluster ... back leading edges of fronts mirroring the leading edges of rears a little more ( where ezzys are much more raked against Leading edge of rear ... )
sizing wise - I would say quads - upto around about 80kgs - 9cm fronts would be good (I'm 77kgs) - run with 15.5 rears g10
Not fully sure for heavier guys but
maybe 80-85 kgs - 10cm fronts ? ....
above 86-90kgs - maybe 11cm ??
above 90kgs maybe 12 's ?
depends what you've been running in your board / got used to size wise
They come in 1 or 2 deg .... so far - the 2 deg working really really good in straight boxes .... for DTL
Worth a try - and after 15 pages of forum punishment on the eyeballs - is about the most 'generalised' , grounded advice I can give for anyone to try .. they will run a bit more 'streamlined' I think than the chunky draft front stock fins that come with most cobra multifins (that to my eye just look horridly thick ) ...






