the voltage monitor is a nice (and necessary) feature but it is not the solution.
I have installed a LED voltage monitor and it was useful because it allowed me to reach a safe place before dying, but it would have been better to being able to complete my 1,600 km trip between my home and my office instead of beeing stuck for 4 days right in the middle, with all the associated costs that it implies, hotels, going back and forth to fix the stator etc... carrying a stator is also not, IMHO, a solution. We need a reliable alternator which doesn't fail so early.
I will definitely buy a new stator from this link earlier in the thread and I am thinking about this series regulator as well. I would really appreciate feedback from somebody who tried that, how it worked and if it didn't interfere with the other electrcial systems on the bike.