I’ve had my sf40 for a few months now and have been making here easier for single handed sailing. I’ve moved the mainsheet track back between the wheels and replaced the German mainsheet system with a traditional 5:1 with 3:1 tweaker set up. The genoa sheets are now using the aft winches that were being used by the German mainsheet, which are where genoa winches normally reside.
All is great for single handed with main and genoa sheets are within easy reach from behind the wheel.
My attention is now on the pair of large cabin top winches that are pretty much defunct especially as the sprayhood gets in the way. So for my next unnecessary project I’m think of relocating these to the combings just forward on the current genoa ones as this seems a more practical location.
This view is reenforced as I noticed the later sf40.3 also moved them to the combings. Once relocated they would be used as the genoa winched when fully crewed with the aft ones for spinnaker.
On my SO40 I added two extra winches to the cabin top but to make them usable with the sprayhood up, they are forward and more inboard than the SF40 winches. It works well. The port winch is used all of the time, but that is partly because the mainsheet lives on the inboard winch, which is something you don't have.
I had thought about putting winches forward of the genoa sheet winches, but it looks like a lot of hassle to mount them and then the sprayhood will need to be recut to secure more forward.
Also, the cabin top winches are smaller than the genoa sheet winches. Realistically, you need to add bigger winches if you want to swap genoa sheets between the winches
The downside of my solution is that the spinnaker sheet will rub on the cabintop