If the cartridge tag can be repaired, I'd do that. However, if you want to rewire your arm, a cheaper alternative to the Incognito is the Cardas Tone Arm Rewire Service. They use the same 33 awg Cardas wire that's in the Incognito. I have no connection to them. I just wanted to point out another option.
For what it's worth... I installed an Incognito on my RB-300 and added a Michell Tecnoweight. The Tecnoweight offered a more significant improvement.
For what it's worth... I installed an Incognito on my RB-300 and added a Michell Tecnoweight. The Tecnoweight offered a more significant improvement.