If money is tight Berny then you should consider the Riley autoratchets as well. The have a rather good performance to price ratio and their holding power is good enough for a 100 sq. ft spi. These ratchets do have less holding power then the Ronstans and the wheels are as well developped for gripping like the Ronstan and Harkens, but they are decent. I've sailed with 4 Riley autoratchets on my F16 for quite a long time and it did work well. The ronstans are better though, but then again you pay for that.

Wouter