Thanks so much for the offer Luka! From what little I can find online, it seems that 3.0C is a bug-fix version of 3.0B so I think I'll consider upgrading my SD1 to C and downgrading the SD1plus to 3.0C.

I have downloaded the 3.0 zip file, but as you mentioned, I would like to hear from someone that it is safe to do. I also need the SD1 sounds transferred to the SD1plus so that I can use it as a backup machine.

I've asked the original owner of the machine to see if he can get in contact with Ketron-Ireland to see if they can provide support also.