So when the 50th plate of the first spindle was fired for 4 weeks later, I used less than 5 minutes later, with the same settings, the same burner and the same firing program the first discs of the second spindle. The first three discs Been unusable during the firing process. Nero announced (burning process failed) !!! ??? Surprise !!! the same wheels ??? The next 6 slices I then fired on a brand new burner, no error message ?? !! But playing with the aforementioned players and the tests with (Nero DVD Speed test program) a disaster. Dropouts and hangers are now the rule, and the DVD test gave more than 1,200 PI errors. The difference of the two spindles is probably the product country. The first spindle Made in Taiwan, the second spindle Made in India. Now I'm hoping for an exchange of the remaining 42 disks, Ricoh will I no longer use.