It seems that most F16's are rigging the spi halyard using a single line system which is "cascaded" to a tack line via two blocks so hoisting one line sets the head and tack of the sail simultaneously. It seems ideal for singlehanding. I understand you can set the overall luff tension of the system when it's rigged.

Some questions:

1) In higher winds, does setting more luff tension depower the spi the same way that more luff tension depowers the main and jib? Or do most people just use the 90 degree fist rule in all wind strengths?

2) Do people adjust the length of the tack line to control how high the spi tack flies or is the tack always pulled to the spi pole block? I had thought that tack line length could be used to tune spi performance but maybe that's a monohull thing. Maybe it's also irrelevant for singlehanded sailing (too much to worry about)? WIth a single line system I don't think you could adjust that independently of luff tension anyway. Is that why two man boats like F18's often use a two line system?

3) Some boats run the tack line and blocks inside of the spi pole and some outside. The inside solution looks cleaner but harder to rig. Does the outside solution work just as well? It kinda looks like more potential to drag or get snagged on something, ie, putting the kite away after a capsize/pitchpole etc.

I asked the following somewhere else but didn't get a reply so I'll try here:
When playing the traveller in gusts under spi, are you just dumping it with each gust and sheeting it as the gust passes? Also, if dumping, are you dumping it just slightly or significantly (ie, ever to the point of releasing it)?

Jerry