Yes, a common issue with 3rd rate and 4th rate medias (Tuffdiscs’ CMC cast-offs, Chinese crap, the lower quality Moser Baer, Infomedias, just to name a few) is that you get the best results at the start of the disc and that towards the edge, aparent quality gets progressively worse and more out of kilter.
I used to see CMC MAG as being a 3rd rate manufacturer but they have improved, and to my mind that dubious distinction has many more landfill-quality media makers clamoring for that spot. I now regard CMC MAG as only 2nd rate.
Then again when CMC rejects a disc, it’s a [I][B]VERY[/B][/I] good idea [B][I]NOT[/I][/B] to use it, because you’re getting into 3rd and 4th rate territory.
With Dual Layers, it’s even worse because those are way more sensitive to quality, being that a double layer disc is a much more complicated beast than your regular Single Layer disc. Most CDFreaks would recommmend only Verbatim for DLs, and to a lesser extent Falcon and “That’s” Taiyo Yuden.
So with “Tuffdisc” DVDR DLs, you’ve got 3 things going against you.
- 2nd rate maufacturer
- a brander that pulled the discs from said manufacturers garbage can
- the inherent complexity of Dual Layer discs and burns.