I haven't tested Varirec, just normal speed reduction in the write transfer rate options (used Nero CD/DVD Speed and set the max write speed to 8X in the options). I suppose Varirec might solve the problem--I guess it's worth a try, but shouldn't FW writing quality be getting better?
Under 1.06 my 0305 drive was almost perfect--jitter 9% and below, beta within 0.01, C1 errors at about 3000 (for the whole disc) and C2 and CU both 0, with TY media burned at 48X. With 1.07, my C1 errors are higher (5 times higher) and jitter swings full scale, but beta is still good and C2/CU are still 0.
On my 0304 unit, which had terrible jitter under 1.06, jitter is reduced, but still not great.
With DVDs, slower burn speeds generally meant less jitter, but with FW 1.07 that's not true for CDs.
Before, my 0305 unit was far better than my 0304 unit. Now my 0304 unit is better than my 0305 unit, but still not as good as my 0305 unit was before FW 1.07. Confused? I sure am.
My 0305 unit's going back to FW 1.06 in the mean time.