can’t tell what you’re pointing out - can you explain in words, the photo isn’t too clear
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Width of mast matches “full” length of base plate. Adds stiffness under the board where you want it. Take a look at the tuttle F4 mast Ken Adgate was riding. It’s also super wide at the base. I think it’s easier to go super wide on a plate and get more stiffness than going super wide with a tuttle. It’s just that nobody did it before. The racers running tuttles got the good stuff.
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Is it stiff? I demo the 75AX, noodle for me at 185lbs. 75RC was little better but still very flexible. The slots are a huge improvements though
Which foil were you demoing with the AX mast?
685 and 800 Orca
Not bad for me at 150 with the 85AX with those wings. If the water is really wonky, I can notice a bit of flex but nothing detrimental
Strange. At 190, and used to be 200, I find the 75 ax fine with the 685 and even the 800. But not the 1050 or 1250, with my weight.
Used to have the 95 RC (Back then TE), and it was rock solid stiff.
Was the mast labeled RC? F4 also have some budget mast in the outlet section.
Stiffest AX there is
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I did use the demo Orca and 75AX and RC to sup foil surf…cranking hard bottom turns and pumping it was when i would feel the flex but im not convinced on those M6 connections, F1 did a full replacement to M8 after years of saying its M6 connection was solid. Those are my gripes and my personal opinion. The Orca was phenomenal but i see F4 replacing that connection eventually to M8
Well no disrespect but you’re a dealer. No dealer and team rider are gonna state the flaws. If i was going to drop almost $4000 on a foil, i want to be happy with the whole product. Like i said, those are my personal opinions, I’m just not 100% confident in the M6 connections
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Everyone is allowed to have an opinion !
I’m a dealer by choice. Love this stuff 
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Just want to add a few comments on M6 screws. Clearly some strong feelings on this topic. We’ve had no failures of the current design, partly because of 15mm+ thread engagement, small fuselage geometry, integrated steel inserts. The design enables the tenon to support part of the side load creating less tension on threaded inserts. Why is this better? Allows for smaller fuselage, less screw head exposure, easier to blend with surface geometry. This is why many high performance foils use similar connections in formula kite, wing racing etc. What are the problems … over torquing can stretch and weaken the screws, if thread engagement is small - screws with strip out, there are limits to the max wing size / span that can be supported. We aren’t making 2m long wings for example!
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I just saw a 600 Piranha.
I’m guessing this is the foil with an AR in between the Orca and Manta.
Can you tell us more?
Actual AR?
Sizes?
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Hi,
Exactly right, we are testing a mid aspect design developed in a collaboration with the x-foils guys. It’s AR10.5 and first size is a 600sqcm. These are focused on steeper more powerful conditions - parawing, wing, downwind and surf. The goal was to combine turning and carving elements of the manta surf wings with the glide performance of the orca! Will keep you posted!
Ride on!
Chris
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I can second this, I have the 137S and have used it on my 800 and on my 635 manta. First time using it was on a 50 mile downwind sup run and in the beginning when conditions were light I was wishing I had my DW tail and as soon as bumps picked up a little bit it was a very fun combo. More pitch stability more turn stability and ability to crank turns. Almost made the orca feel like the manta. By 20 miles in I was stoked on the choice, the stability and control made for a maybe more relaxed ride which helped for such a long run. I will be using this tail when the bumps are a little more substantial and I feel like flow and control is desired over speed and glide.
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Thanks for the insight. Do you know what an appropriate torque value is for M6 fuselage screws?
@Chrisrad99 I assume the hammerhead foil on your site is a higher AR race foil?
Hi,
Hammerhead AR is a bit over 16! I check the specs on torque - hand tight with a screw driver
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I was going to ask on what planet is an AR10.5 foil considered mid-aspect - and I suppose it now makes sense when your high aspect foils are AR16 
