Therefore I created a new helix with half the height ( 0.76 ) and with the same method I created a more correct thread.
When you have created the helix, done all the tweeking above, duplicated,
combined and merged you'll have a new mesh you can duplicate. Move it twice as far as last time ( for me that was 1.52 this time. If you're still following the older tutorial it would be 3.04 ) and combine, merge and duplicate again. Now move it four times as far etc. etc. and you'll have this thread up in no time.
I need to figure out how to end this thing now. Both sides will go over to a solid cylinder. Once again I'll use a good old friend of mine called placeHolder. I move him over to the end, scale him to fit and move him where I want the end to be. Now I'll have to model it to fit the placeholder.
It's kind of tricky to get it to round off and stay good looking, but we know how don't we? Well, if not, we will soon... I'll take this part step by step: (images dealing with this section below are clickable for larger view).
Delete these edges and also delete the vertices they leave behind.
Select the outer loop except the one where our ending thread is connected, scale them all together in the z-axis and move them out a bit.
Merge these vertices.
Select all the edges at the end of the end thread and extrude them.
Split the polygon you almost intersect and move the vertex below it to give room to the end thread.
