In the gaps, I don't have to much problem, but I understand what you are saying. What about putting a syrofoam tubing, the large type. You can cut it to fit. Than if you want, you can always put a tape on that. Makr sure if you put a bottom board in like I did, that you cut an opening on the cord side to get your hand in to plug cord in. I have a heck of a time getting mine plugged in unless I unplug it from the wall and the switch is underneath also so you need a little area to get into there on that side.