Any Paint Tool SAI users here?

My process is I sketch twice (first sketch is mainly just to get the proportions right, second is to refine things and add the details), and then I do a Linework layer and use the Pen tool to do the line work. The nice thing is you can modify the lines so you get perfect curves and delete any extra anchor points that contributed to wobbly lines. It SOOO much feels like cheating, but it looks so much nicer. XD I can't... entirely recommend it because it takes gobs worth of time.

My question is with the Pen Tool lines, is there a way to merge anchor points so two separate lines can be linked as one? That would save me from having to compensate for these gaps. I've tried Ctrl, Shift, Alt, and all kinds of dual combinations of those and nothing really seems to do the trick, so I'm not sure if there's some other way of doing it.

If you need a picture reference to explain what I'm referring to, just let me know. :3