Just a note on my receiver box:

Looking back at my first post, I saw where I was running the MBX7e in the end of January 2013. Since then, I have not had a reason to open the receiver box up until last week when I needed to remove the battery tray for some maintenance (requiring that I unplug the ESC from the receiver).

In both of my ECO's, when I'd open the receiver box, it would have a large amount of dust build up inside. I use small pieces of cut foam to hold the contents in place, and these would be completely saturated in dust. Although this has never caused any known problems, I just found it interesting how this "sealed" box would get so much dust in it.

When converting the ECO receiver box to fit the 7, I too wasn't keen on having to chop up the bottom of the receiver box. But, as mentioned by a few others and with 20+ years of 1/10 racing with the receivers simply mounted to the chassis (out in the open), I figured a partial box probably wouldn't hurt anything.

Upon opening the receiver box last week, I was pleasantly surprised on how little dust was present in the receiver box. I had joked with some of my fellow racers on how I made the hole intentionally (on the bottom), so that the dust would fall out. Appears to not have been a joke.

Interesting to say the least.