I have used a Filzer D2? or D4? basic wireless for 9 years on my Arvon1 touring bicycle, and this past summer it became intermittent. Changing the batteries helped temporarily. Then it seemed to die - unless I shifted the handlebar bag (which kept getting more and more "stuff" in it). I figure intermittentcy was caused by a "shielding effect" of the stuff in my handlebar bag contents and on the front platform of my front rack - which also seemed to get more and more stuff placed on it. Because of my training and work I understand the concept of electromagnetic shielding. Does anyone have any experience/thoughts on this wrt my Filzer?

I have just purchased an AVO M3WL and will see if it works better. It was suggested that the tramsmitter signal was stronger than that of the Filzer.