I stumbled across this site today, and am happy I did. I tried this method and the connector grabs carts a lot better, and I can see the top row of connectors bend as far as they'll go! ^^
Once the paint on my case is dry(I am spray painting my old NES case back and white instead of grey and beige. ^^) I'll reassemble the unit.
Then, I'll probably try it with my other 3 NESes lying around. ^^
I just took a few Q tips moisined it a little use them to clean out all my carts and then I took off the NES's cover and did the same to the connector and cleaned out all the dust and dirt in there wile I was at it and it has been starting up first try every time ever sence