Classe DR-5, DR-5L, DR-6, DR-6L Users

Good morning all. I would imagine that each of the above pre-amps have the same basic innards. If you have not made any changes to the MC section would you please share what MC cartridges you are using. I think the standard output setting is 22Db on the MC side. I am interested in the purchase of a good MC cartridge.

Also, I understand that changes can be made in the DR-5 moving coil section by replacing the R-15 and R-16 resistors. I also understand that these resistors don't have to be soldered in but can just be pushed into slots. If this is not correct please put me on the right track. Has anyone purchased resistors for this purpose?

Thank you so much for all input and comments. I really appreciate your time.