Maybe buy one of those gel cases for 15 or whatever they end up selling for? That would contour the E3D very closely and minimize the snagging effect while at the same time adding very little size or heft to the phone. A few possiblities at the link below.
HTC EVO 3D Cases by Type - shop htcpedia.com
I'll likely get the kickstand case, actually. Depends on how much bulk it adds. The case on my DX makes it a bit bigger.
