14minus9 wrote:something else to be considered:
since all "legit" chips of vailixi seem to be burned to UV erasable eproms, they would be susceptible to "bit rot", which means that they eventually just die on you. eproms are said to have a shelf life of >10 years, so in 1-2 years, defective original chips might start appearing.
The danger of "bit rot" is not limited to machines that have a Vailixi upgrade.
All MPC 3000s and many others (60, 2000XL as well as Akai samplers) irregardless of OS version have at least one EPROM separate from the OS chips installed when the machine was assembled at the factory.
Yes, at some point the chips will degrade, but until then it's not something to worry about. I have some gear that is much older than the MPCs with EPROMS and they have not shown any signs of bit rot yet (knocking on wood).
I've made backups of the original operation/voice EPROMS of my personal machines in case they become defective. And as I have the receipt for my MPC 60 OS upgrade from Roger Linn I would suspect he would replace my original chips if they became defective due to bit rot.