Crumar Musical Instruments User Group.

Hello everyone, i'm just new here. i wonde if anyone may have a crumar performer to sell. on ebay it would be the best. i live in France. 
so ... it seems that there are two versions ? MKI and MKII ? i didn't realise that. what are the differences ? 
is it usualy easy to fix these synths ? 
hearing some clips mostly on youtube, i thought that there are a lot of synths with tons of knobs, which don't please the ears that much. So ..; why not implementing a few mods with this simple base ? 
what ideas would you have about it ? 

thanks !
Adrien