The amount of leftover at the spi halyard is relative to the amount of mast rake, given that the pole height is fixed.
Actually, the Tiger was originally set up to sail with less mast rake than is currently the norm. We used to fully hoist the Tiger spi until we started to use more rake.
It is nice to have a little leeway there to allow a little flexibility with spi luff tension- more in the breeze, less in the light stuff.
I like to have as much spi luff tension as i can whilst allowing the spi to set correctly (not needing to be oversheeted). It varies for different wind strengths and therefore a fixed hoist is not really suitable.