I have kidney stones also and I am aware that a low oxalate diet is good if the kidney stones are calcium oxalate stones. I have never managed to 'catch' a stone to get it tested but my older sister has calcium oxalate stones and she is on a low oxalate diet. She does not have MS but has been a vegetarian for many years although does eat a little dairy. You are right, many of the foods which are part of OMS are high oxalate but there are many that can be safely eaten. Chickpeas and Lentils are low oxalate as are some fruit and veg but many are unfortunately high in oxalate, things like spinach, berries and many more really healthy super foods. It is really difficult to know what to do. If anyone has ever experienced the pain of a kidney stone (excruciating) you would consider limiting high oxalate food. I haven't gone as far as limiting high oxalates but I do drink alot of water and this is probably one of the most important things anyone with kidney stones can do ....especially if eating high oxalate food. I am thinking that I should not be eating as many almonds as I do though!
Without knowing 100% whether my stones are calcium oxalate stones, I'm a little reluctant to stop eating so many of the vegies that I love.
My sister has managed to reduce the size of a stone since being on this diet...she has had several renal colic episodes in the past few years. I'm just hoping mine stay quiet!
I would be really interested to see how you get on, good luck