Thanks all for your responses and for sharing your experiences with Steve.
Steve, we spoke briefly on the phone and I was left with the impression that you are knowledgeable and would be a terrific person to deal with. A couple of things were still not clear to me from our conversation, so perhaps all here would be interested in further clarification:
One of the cartridges that we discussed in our conversation is my Monster SG2000 which needs a new stylus. The original boron cantilever and suspension seem fine to me. Would you be able to keep the original cantilever and attach a new micro-ridge profile stylus? This would be my preference. If a new cantilever is necessary, can you replace with a boron cantilever? Same scenario for my Shelter 901 (different tip profile).
Thank you!