3520 issue, insight appreciated

Here are some scans based on various firmwares. I’m trying to determine if its my burner malfunctioning since the media itself is considered “premium” , taiyo yuden right.

All burned at 8x . Fuji +R Yuden 000 t02 . There seems to be really large spikes at a bit after the 1 gig area, you’ll see what i mean in the examples. I have several images like this, I don’t think i should flood the forum with it unless others require more pics to form an opinion?

Anyway, thanks for reading this.