Forget about it and use the amps and enjoy them.. If they have an issue, just contact the service centre and send them in (costly, but nice to have that available).
I sent a DR3-VHC in a few years ago (when Classe was owned by B&W) and they repaired it with no problem.
Just had an electrolytic cap crap out on me in my DAC1 D/A converter and just had it serviced locally - nothing 'touchy' like the VHC Darlington output devices that would give a tech any problems.
Similarly, had a preamp (DR-7, an over the top assault on the then state of the art preamp, with twin phono stages and a separate power supply the size of your DR8) give some problems, but had a local tech clean the contacts on the twin volume switches - not everything needs to go to the manufacturer.
I sent a DR3-VHC in a few years ago (when Classe was owned by B&W) and they repaired it with no problem.
Just had an electrolytic cap crap out on me in my DAC1 D/A converter and just had it serviced locally - nothing 'touchy' like the VHC Darlington output devices that would give a tech any problems.
Similarly, had a preamp (DR-7, an over the top assault on the then state of the art preamp, with twin phono stages and a separate power supply the size of your DR8) give some problems, but had a local tech clean the contacts on the twin volume switches - not everything needs to go to the manufacturer.