I have been windsurfing a couple of sessions (2hours each session in 2-4Bft, #6 sessions max) previous season and bought a 2nd hand Rio S (~196l) - width 79cm. After that I tried (silly me) to get with my board and 4.5m? sail at the beach (starting this season, couple of weeks back) through the shorebreak with 3Bft (max 4Bft), I succeeded a couple of times, but in the end it was a complete failure and enourmously bad for my moral. After that I tried to go back to a lake-isch environment and it was like "a walk in the park" compared to the sea

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Now, I am approx 75kg. Today I tried sailing in 17-27knots with my "little" board and 4.5m? sail and couldn't really hold the power in trapeze/hands, the chop was quite heavy on the board and it wanted to go upwind (mast foot far forward). So I practised waterstarting (from little lower than shoulder height) and I think I accomplished them at the end of the 2hour session 60% of the time.
My question to you intermediate/hard/knowledgeable windsurfers is the following:
- I can beachstart, trapeze, uphaul, go upwind, non-carve gybe in low wind and in the right conditions use footstraps. Nothing perfect, but OK-isch?
Is it time to go to a less voloumous board? (I have a Tabou Rocket 125lts in the garage from 2012 - width 69cm)?
When should I take out the Rio S (how many knots)?
Am I doing bad with the 4.5m? sail? (it is a Tiki sail, no X-ply I think - beginner sail with normal cloth-isch fabric? & feels unstable - proably because of my rigging/trimming)?
Shouldn't I be able to sail bigger sails for my weight?
It's a mace when to use which board and sail in 10 knots, 15 knots, 20 knots, 25 knots at this point hahahahaha

Kind regards!
I appreciate any comment on this topic!