@dogberry I fully empathise with your concern for having a access to a rebuild for a Cart'.
I lost access to a exceptional Third Party Cartridge Service as a result of Brexit, the Technician was not interested in all the new requirements associated with the to and from shipping and reduced the customer base.
A real shame and a fair proportion of testimonials given on the Web Site were from UK Based Customers.
I feel confident, I am back on track when the time comes, but a trusted workmanship, is a luxury.