To be safe, I've done two on each side, mainly since I don't get along with my sewing machine. If you also crocheted, as you mentioned, one should be fine.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry