I would go for the part refund and buy decent electronics with a mind to transplant to your next machine. . . . No point replacing crap with crap.!!

To be honest I'd want more than just the refund of the Drive and BOB there's your fiddling time and Down time to take into acount.
These things need to be accounted for when your thinking about electronics and machine because what's the point having a machine if your spending more time chasing faults or fixing the bloody thing or than using it.?