3 pedal autoshift swap

[Skman]

I've got an 18sp autoshift in my 13 w900. It's constantly throwing codes and issues so I'm thinking about switching to manual since clutch is there already. Wondering if it can be done fairly easily using existing transmission or if it would make more sense to drop it and put a shift tower and a reman 18 into it instead? Get whatever changes need to be done in the ECM as well.