RE: Isonic 111 speed
Hmm. I would guess you have been using the wrong fin. On my iSonic 105, I put an 8.0 on it with a 40cm fin. Have you tried the smaller fin yet? You might not get up on a plane as easily, but once powered up, I would think you'd do fine. When I'm really powered up, I'll use my 34cm fin with the same 8.0.
Starboard [Gemini, F-Type 148, iSonic 105], AHD [Convert 60, GT Special 73], Windsurfer
Neil Pryde [v8 9.8], Sailworks [Retro 8.0; Hucker 6.6, 5.6, 4.8]
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