I had the older F2 Race boards and loved them. I loved racing them too. I never tried the F2 380, but wonder why it would need to be lighter anyhow?? Stronger would be good though.
I would love to have a Phantom to race but the cost of entry/participation is STUPID high! I have been considering replacing my old cracked and waterlogged Speed ProAm with a later second hand model.
But now I am actually considering a Windsurfer LT.

That is something of a miracle, because I bought a new Windsurfer OD decades ago when they changed to the retractible CB. There was lots of racing in the area and a strong fleet I was keen to get involved with. Despite that, I ended up
hating it with a passion. It was the worst race board I have ever used, crap to sail and no fun at all. I persevered for a month or two, racing and sailing it, trying to find out what it was that so many raved about. I never could so I eventually sold it. I continued to have many happy years of racing my F2's and later my Speed ProAm.
Over the years I sample sailed some other boards including a Mistral Superlight and Mistral Competition, and liked them a lot more, but there was no class racing anywhere near me, or
anywhere as far as I could tell. Now I am keen to sail one of these LT's and see how I like it. One thing that worries me a bit is the stone age rig design, but I am open minded about that until I try it. At least it is low cost!