Need to get information on a Levinson JC 2 preamp

Need infomration on improving or repairing a Levinson JC 2 preamp. All information would be helpful. Thanks.
I've done a few repairs and mods over the years to my own JC-2 and ML-1. Let me know if there is anything specific you are after and I'll try and help. Regards, Richard
change all the tantalum caps. replace with non-tantalum.