8103 Programming - Complete Guide
Got my 8103 in this afternoon, and by the evening I had couple of setups going that used most every available function, for the fun of it - didn't really have to refer to manual either (after having read the PDF copy about twice). Prior experience with the 652/662 made the transition easy. Comparing to the 662/378 manual, the later has a great beginner's approach that gives you a little more background on specific functions, eg Aileron Diff; the 8103 just drops it in front of you. Another example is for eg a recommended EXPO rate to dial in - also missing in the 8103.
Still I'm sure there's lots of tips and tricks that they should add to the manual - a cheap way for JR/Horizon to add value to the radio imo.