We have the original FP Spifurl with the Facnor FX2500 furler
. We use it a lot.
I would suggest that you initially use the most basic system possible, which is what we have. This will cost you no money
and no time, and you can always decide to change it later. Once having experienced it, consider to extend it. It might be that you, just like us, would then leave it as it is.
One good reason for simplicity is that our case (spifurl with furling
line half-way up the dyneema
forestay) you have to pull an enormous amount of line around, and you also want to do it fast. Then you don't want the friction of blocks.
The system consists of the furling
loop, a block and a stretch loop. This yellow stretch loop we tie to the starboard rear edge of the trampoline. See attached pictures.
Disadvantage of our system is that it is not obvious how to block the furling loop. We do that by tying a knot
at the block. There is some risk of accidental unfurling. This only happened once, because we tend to remove the spi in most cases. Mostly there is a good reason for removing it. Maybe when you race
you might want to keep it in place for the next leg.
It would be nice to use a snatchblock to block the furling loop. However this does not work both ways, and we like to be able to furl in both directions. Plus, due to flapping of the spi or other reasons (stumbling over the line?) the loose-hanging side of the furling loop will probably snap out of the snatchblock. I looked for a suitable snatchblock and did not find one yet. Maybe put a clutch
on the forebeam?
I would be interested what you decide, and -when you bring the furling line back- whether that works well.