building a helix from scratch?

[MasonJar]

<!-- m --><a class="postlink" href="http://en.wikipedia.org/wiki/Butt_joint#Biscuit_Reinforced_Butt_Joint">http://en.wikipedia.org/wiki/Butt_joint ... Butt_Joint</a><!-- m -->

<!-- m --><a class="postlink" href="http://en.wikipedia.org/wiki/Lap_joint#Half_lap">http://en.wikipedia.org/wiki/Lap_joint#Half_lap</a><!-- m --> - the end lap or splice is what you'd be most likely to use.

Andrew