I am in agreement that there are going to be Cartridge Brands that might prove to have a requirement for a part that is only obtainable through the Manufacturer, or a Second Donor Cartridge.
My experience was as sure footed as one could want.
The Technician is known for their Workmanship and
their Freelance History of working on the Cartridge Designs for a Cartridge Producing Company.
No work is to undetaken until a suitability check is carried out through a a pre' rebuild Inspection.
There is a chance the the Technician carrying out the Inspection may have to report back that a certain part is in a condition that is unusable and the rebuild will not work to the level of the required Specification.
( I know this is a possibility, as I know of Cartridge Owners who have been supplied this information)
This Service when used myself, does not produce a Cartridge that will Play Music after a Service like some known Services, which in cases proves to be a lesser quality than the Manufacturers Original Product,
but has a sound quality that is perceived as improved over the poor condition Donor Cartridge that received a treatment.
The rebuild Service used by myself, is a Rebuild Service that will supply a Cartridge in its Original Build Spec, but having undergone extensive Quality Control Measures, from microscopic intensive cleaning, through to replacing the Parts with Manufacturers Parts, followed up by multiple hours of measurements and adjustment, to ensure the Cartridges Specification is exact.
Or in my case, the Rebuild Cartridge is Producing a Cartridge that has the original Generator Coils retained, with a complete exchange of Parts
that are used on much more High End/Exotic Models,
each configuration being chosen, is selected with the Technicians understanding through discussion with the Cartridge Owner preference for the Cartridge Presentation.
The Cartridge will undergo a Microscopic intensive cleaning, along with the Rebuild, and on completion will put through multiple hours of measurements and adjustment.
I have become a fan of this Technicians work, and after having investigated as much of his Rebuilds as possible through Web Searches can only say he has many supporters.
To help the OP with their investigations, I have sent a PM to show them the contact for the Rebuild Service and assess the supplied information for accuracy.
My experience was as sure footed as one could want.
The Technician is known for their Workmanship and
their Freelance History of working on the Cartridge Designs for a Cartridge Producing Company.
No work is to undetaken until a suitability check is carried out through a a pre' rebuild Inspection.
There is a chance the the Technician carrying out the Inspection may have to report back that a certain part is in a condition that is unusable and the rebuild will not work to the level of the required Specification.
( I know this is a possibility, as I know of Cartridge Owners who have been supplied this information)
This Service when used myself, does not produce a Cartridge that will Play Music after a Service like some known Services, which in cases proves to be a lesser quality than the Manufacturers Original Product,
but has a sound quality that is perceived as improved over the poor condition Donor Cartridge that received a treatment.
The rebuild Service used by myself, is a Rebuild Service that will supply a Cartridge in its Original Build Spec, but having undergone extensive Quality Control Measures, from microscopic intensive cleaning, through to replacing the Parts with Manufacturers Parts, followed up by multiple hours of measurements and adjustment, to ensure the Cartridges Specification is exact.
Or in my case, the Rebuild Cartridge is Producing a Cartridge that has the original Generator Coils retained, with a complete exchange of Parts
that are used on much more High End/Exotic Models,
each configuration being chosen, is selected with the Technicians understanding through discussion with the Cartridge Owner preference for the Cartridge Presentation.
The Cartridge will undergo a Microscopic intensive cleaning, along with the Rebuild, and on completion will put through multiple hours of measurements and adjustment.
I have become a fan of this Technicians work, and after having investigated as much of his Rebuilds as possible through Web Searches can only say he has many supporters.
To help the OP with their investigations, I have sent a PM to show them the contact for the Rebuild Service and assess the supplied information for accuracy.