Grungebuster mat and Sony 999ES

"Herbies has been great!!He is going to send me another thinner version to see if that works and he refunded my money immediately upon hearing of this problem.He is a true gentleman...Hopefully the thinner mat will be the ticket."
-Seekburk

It sounds like he's really backing up his product, sticking with you--literally and figuratively--through thick and thin.

Yes, i payed very close attention to applying the mat carefully, and correctly, as per the instructions and after it did it the first time i most certainly payed VERY HIGH attention the second time and it did it again on THAT disc.It did it on one other dvd as well.Herbies has been great!!He is going to send me another thinner version to see if that works and he refunded my money immediately upon hearing of this problem.He is a true gentleman and i really enjoy what this product does but for some reason with my 999ES(it has the thin drawer of course)it is doing this.Perhaps there are just certain anomalies on certain discs.Who knows what is going on but my player never acted like that ever and the mat was definitely flat on the disc when it was removed.I am really glad it did not get jammed as it was a heart quickening moment to hear that awful sound of my transport clacking and then not stopping!It was with much trepadation that i tried it again on another dvd and it did it again but i was able to stop it.That being said i tried it yet again and it has worked on like 5 more just perfectly so i don't know what the deal is but there is some deal going on.Don't you hate that intermittent stuff : 0
Hopefully the thinner mat will be the ticket.

I have a ModWright 999ES and the Grungebuster 2 CD mat seem to work fine for me. Steve does mention to not leave them on the disc for any extended period in a slot loading player. Perhaps it wasn't pressed down on the edges and it came loose. Was it in place when you opened the drawer after you powered up your 999?

Good luck