Have you joined the Janome yahoo group?
[email protected]
There are several out there for different models of Janomes. All of them helpful. What stitches are you trying to adjust, embroidery or regular stitching? Skipped stitches usually is the wrong needle size for the thread and or project. For example, if FMQ, you need a 90/14. Types of thread also dictate the size/type needle you are using.