Dear Dgarretson,
I sent mine in at the end of June. I, too, was told via email of Mr. Ledermann's illness. So I waited patiently. By around Thanksgiving I was becoming concerned that my cartridge was lost in shipping to them. The next morning I received a call from Mr. Ledermann -- I would receive my cartridge shortly, and he explained the work that needed to be done to it.
I received my repaired cartridge in late December.
I will send him more cartridges to be repaired -- I am completely satisfied with his excellent work! The cartridge has now broken in fully. It sounds fantastic! Even though it was his cheapest repair, I am convinced of its quality.
There is really nice air around the instruments, vocals are pretty forward (but not too much so) and you can hear vocal nuances and timbral qualities, there is detail in spades, depth and width are excellent, and it is dynamic. I also like the tonal balance -- the midrange is silky, the highs are smooth, and the bass is taught.
Of course, I will post more results as I get more cartridges done.
Totally worth it! Long wait, but Mr. Ledermann was ill, and still extremely busy!