Here is an image gallery for the Linksys LN1301 (MX4300) disassembly I did;
I didn't see anything interesting or unexpected. Opportunities for hacking are minimal. The serial port is already exposed and easy to get to. The antenna connections are easy to get to if someone wanted to do an antenna mod. NAND is on the back side, and there's plenty of storage on this thing anyway. Only one of the radio ICs had a thermal pad to connect to the heat sink. I might add pads there if I think it's an issue. My RAM is Kingston, or at least that's how it's etched. I laughed about that.