Have you thought of acupuncture ? It might help the wobbles. I swear by it for the Basenjis, especially for the older ones.
The veterinary practice I use has two experienced acu-vets. It can't actually cure mechanical failings but it promotes the body to manufacture its own cortisone and once the dog is pain-free and can relax, nature takes over and conditions can heal themselves. I had a 10 year old who developed lesions in the high neck. He screamed as he curled up to lie down and when he stood up and at other times. He was in a bad way.
After three sessions the first week, then weekly for a month, then monthly - - - the vet signed him off but I took him back for a booster every 6 months or so for a couple of years - 'just in case'..
Aged 12.5, he went Best Veteran at a Club Specialty and the judge told me afterwards he had pushed hard for the reserve dog ticket (reserve best dog) but lost out to a younger man !
Since then I have considered acupuncture on many occasions and used it where even slightly appropriate to very good effect. I suggest you at least discuss it, along with manipulation, for your doggie.
Good luck.