Longwinded one, bear with me. 

I've been using a Cateye Cordless 2 for a few years. The transmitter got snapped off during a flight last year (yes, the bike was boxed), so I replaced with with a Cateye Cordless 7 transmitter - worked fine with the #2 bar unit and was much neater, smaller and easier to position. It came as a kit with a new bar bracket for the old bar mounted receiver (so you can swap the one receiver between two bikes).

The receiver died on me a couple of days ago, something shaken loose internally after riding a 70+km section of cobblestoned road. This was because the receiver itself was rattling round noisily within the bar mounted bracket, which has lost its close grip on the receiver over the last year. This happened with both old and new bracket designs, something I attribute to the heavy, bulky nature of the Cateye Cordless 2 design.

Given that the #7 transmitter is so much smaller and neater than the #2 one, can anyone comment (from experience) on whether this also applies to the #7 receiver, and what effect this has on the longer term durability of the unit as a whole?

I'd like to know so I can judge whether to buy a new receiver, or Ebay the transmitter and buy a corded computer (I know some people have had more general problems with cordless designs, but other than this I never have). Ta.