@positron - I didn't completely open it just took a peek but I think you cannot remove the grill piece. I'll post an update here next time I crack it open again. But that's if I find a fix for the disconnected wire.
Here's some pics I took of the problem I have.
1. This shows the blue wire not connected/soldered to anything.
2. This shows the sound chip inside ED-209.
3. On the right you can see the wiring for the on/off switch for ED-209. I noticed there's a 3rd one that hasn't got any wire connected to it but I'm not sure if the blue wire goes there or not. I hope someone can help me with this.
Finally, exactly what Iw as hoping to see one day, but didn´t expect it do be so soon.
Still contemplating customizing ED. Meaning open it up, deepening the grill and stuff, but only if and exchange piece for dome and sleeves are in.
Not just for the grill, but when you have to **** him up completely.