Quoted from Nokoro:
Yes, you can diagnose the boards using the method in the manual and figure out which are bad. JJP can sell you the older boards. Or, you can find someone who recently did the 2.0 conversion and buy their old boards off of them assuming they are working. Depending upon how many are out on your game, the latter might be cheaper as buying the individual boards can be expensive.
My 2 cents, just do the conversion. It will take 12 hours plus or minus, but you can spread it out over many days and do it in chunks so it is more manageable. I wouldn’t waste your money on buying replacement 1.0 boards if your are ultimately going to convert.
What's the difficulty rating on doing the 2.0 install? Is it pretty straight forward, just time consuming?
Does the JJP instructions cover everything? And drilling into the pf required?