I have recently bought myself a sail rig consisting of a Gaastra Poison 5.4 wave sail, etc, to sail my SUP.
I have been out 4 or 5 times and and reasonably competent with the SUP, which is a 9'6", 153lt JP Surf. BTW, no windsurfing experience prior to this. Only surfing and sailing.

I have found the sup very slow in the water and would love to have a board that would plane easily and be buoyant enough for my level of sailing. Don't want it sinking when uphauling. Although not super good at it, I can beach start, but never tried water starting yet.

I have been looking for old longer boards mostly with the dagger board. Don't know what to look for particularly but I have been mainly looking for volume, would think I want at least the same as my sup but preferably more. But most boards I see have much less volume than my sup.

If you can offer some suggestions as to Make and Models that would fit the bill or offer some advice on dimensions and volume, or anything else relevant would be awesome, thanks.

Cheers,
Ken.

I have included a pic of my rig.