Sorry, I can't answer your question OP, but I have one for you. I didn't know these tests existed but I'm not surprised and I think its great.
Do vets make use of these tests if you have one done?
Stone, I don't necessarily see it as a good thing. Sure, some things can be avoided or watched for, but probably not fixed. This is just my train of thought, when asking, "why?" My son has an FGFR3 mutation. I once sat in on a conference with the medical advisory board who deals with this condition. All persons affected have narrowing of the foramen magnum. There can be compression on the spinal cord. When asked about doing an MRI the specialist said, "If I look at it, I am going to want to fix it. I tend to not do tests, when I am not going to know what to do with the results. If there are no symptoms, I do nothing."
My BIL just died of lung cancer - a very rare genetic mutation. My husband discussed this with his doctor. His doctor said, "I don't think there is test for that. But - would you really want to know?"
People tend to think of genes in terms of getting them from your parents. You have them or you don't. You are carriers or you aren't. But, genes mutate. My husband, nor I, have the FGFR3 mutation. Testing us would show nothing, because we don't have it. None of my other kids are carriers. It is a dominant gene. If you have it, you have the condition. It did not exist before my son and only exists in him. So yeah, you can have perfectly clear parents of any genetic disorder and then - BAM! a gene mutates.
I am strictly in the 'not going looking for trouble' camp. I value my sanity.