All of my cakes use the sps system, it's fantastic. I buy the sps plates from Bakery Crafts, however I don't use their support pillars. They are very hard and as Loriemoms, said you need a saw to cut them. The wilton white plastic dowels that come 4 to a pack actually fit the plates perfectly and cut easily.
Thank you cfao, I LOVE this idea. I've only used sps once on a large wedding cake, but I hated cutting the pillars. I've used the wilton plastic dowels before (with regular cake circles) and they are definately easier to cut. If they fit sps snug, that's perfect!