Or you could run your spin halyard like mine, up the luff track and over the top. The added friction keeps it from just falling.
Mike, if all else fails i will try that.. Its not that i don't love your system (i do) and would love to have my spinhalyard in the track... I just wanted to avoid moving my spinlock to the base of my mast (as there is already a block mounted there for the mainhalyard) and wanted to avoid putting a double block in my mast head.... plus one more block bent over the top-front...
If all else fails and i do end up wanting to do that... i would have already trimmed my halyard/retrieval line all the way and would need a new sheet..... grrrrr