Hi Bubs,
Give Chris D a call as I am pretty sure that he has a 36cm fin that would be suitable.
Cheers
Chris

Hi Bubs,
Whats the width of your 158ltr?
I ride a Mistral 161 ltr board mostly and the ideal fin on larger sails is 50cm, and smaller and I just dont get planning early. That said I am currently using a 48cm freeride and it seems perfect.

I think it depends on the sail size, board width and wind strengh.I was for a while using a 38cm, but could never get on the plan unless it was blowing its head off!

A good large weed fin will do the trick, I and Guys similar to me 90kg plus, all use 34cm + weed fins on our lightwind boards, with sails of 8mts plus, so a 34cm or 36cm weed will do the job for you.

SOS has some cheapies going for around $130, the best that I've heard of are Lessacher weed fins, I've never tried one, but OS guys on the Starboard forum rave about them.

i have a 143 litre JP board and find it works just fine with a 46cm fin with a 7.5mt naish koa sail . i tried using a 38cm fin but found it difficult to get on the plane .

at goolwa near the barrage there is a huge problem with weed as its only waist deep and you can see the weed from the shore. so im considdering getting a weed fin even for when i use the board because the weed is very close to the surface of the water.

because we do quite a bit of sailing there when we hire a place for 1 or 2 weeks at a time it might make a differece.

i think getting a smaller fin would be usless because it would still get caught on the weed underneath and we would loose quite a lot of performance. If i get a new fin i think for the reasons we need it, a weed fin would be a much better bet.

thanx for the advice