So I successfully modded my original NDSL dust cover so that my EZ4L fits inside it, and now the whole thing fits perfectly inside my NDS without any extrusion. However, there is one problem though. The width of the PCB is so long that I had to shave the face (front panel) of the dust cover to the point where it became transparent. All of this was done using a Dremel...and the result is not pretty, as you can imagine. Basically here's what I did: I used the base (bottom) plastic that came with the EZ4L and got rid of the front panel. I then took the top part of the original dust cover, and got rid of all the plastic sticking up so that all you have left is a flat surface behind the front panel, and then shaved the front panel to the point where it became transparent (see through). Now I just put the two pieces together (with the PCB inside) and glued them together using super glue. Now the front panel looks ugly because it's see through (partially anyway). I think I can do a better job if I had more control over how deep to cut into the front panel. So I was wondering what kind of tool I should use for this kind of job? Like I said, I used a Dremel and it was tough to control and hard to create flat surfaces. Also many people found that the battery of the EZ4L is too high to fit inside this configuration. I resolved this problem by cutting a "pocket" on the original dust cover where the battery goes. Basically I planned to cut a hole there. But I realized that the battery fits in perfectly before I puntured a hole there so I just stopped there.