With all the buzz around F4 I’m curious about heavier rider feedback on the 85 RC Mast. Currently around 96kilos dry. Would be winging and some SUP foiling. Main concern is flex and durability. Would it be suitable to jump with the 900 orca for example? Thanks in advance!! 
I am 93kg with the 85RC. I have been very happy on this mast - both stiffness and durability. Been on this for 6 months and normally break things pretty quickly. I am 80% parawing on the orca 800, and 20% winging on the manta 750. Honestly don’t buy the orca 900 to jump it.. it is just not appropriate for a foil that size.
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Mast would be totally fine for sure. I would not get an orca 900 for jumping. It’s not really the use case, foils in a 12AR should not be jumped in my opinion.
The manta, now that you could get after it.
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Thanks! Agree that Orca does have quite a span. Is the connection solid/ proven?
No issues for me with f4. And crucially no bolt loosening during use, which is what I struggled with with the similar looking f-one system. I got comfortable with the f4 connection by looking at their racing / windsurf background. These guys are not new to the party.
Yeah 100%. They’ve got huge guys on windsurf rigs racing under huge loads with the same system. Granted the sizes are smaller, but still.
F4 does recommend changing the bolts every 90 days to keep from potential bolt issues at bay.