well, I lstart by making sure I have loose tips...like these current baby dreads, I'm not bothering to dread the tips at all...

I start by doing my best to "ball" the extension head, where it's gonna attach to the new dread, give the thread something to hold onto...I then secure the thread into the extension, by first sewing down inside the length, maybe about 2 inches or so, and bring the needle out of the dread. I then insert the needle back inside the dread and sew back up again...this ensures the thread ain't gonna just slip out and have your extension fall-off. I then attach it to the newbie dread with a small connecting stitch and knot, making sure that the two are held VERY close together, and then do the same length-thing with the newbie dread...so they both have been threaded-up inside...THEN I do this a stack of times, at varying lengths throughout the new long lock. second-last step is to do a few smaller stitches around the circumference of the lock's connecting point, to really make sure they connect properly. THEN, last step is to use a wool needle, and thread-in the loose bits from the newbie dread, right down into the extension. Then I usually chuck a bead over the join (not that it's usually very noticeable, but to add some strength), or add a cotton binding...

After time, and this is NUTS, I have found that the new half of the dread actually starts to "suck-up" some of the hairs from within the older section, like, from inside of the older dread, and essentially strengthens the join itself!

Hope I explained this well-enough for u to understand LOL I guess it's a good thing I dun write manuals for a living LOL :P