More to explore:
Seamless joins for rounds. Perhaps I can avoid those messy slip stitches completely!
Seamless + symmetrical.................. step by step, a technique to achieve a seamless join when crocheting in the round. This technique achieves an almost invisible join.
How to avoid showing where the crochet stitches join. This is a fabulous tutorial with tons of step-by-step pictures.
Seamless Symmetrical (Seamless Joining) by Sarah London
crochet tutorial - create a seamless join when crocheting in the round
crochet technique to achieve a seamless join