As a muscle therapist I am impressed by your assessment and choice of treatment for this injury. It is pretty much what I would have recommended, although I would - after a week or so - have added light massage to the recipe (not just for the sartorius but for the whole thigh). Get that blood flushing without pushing your body too hard. You will experience some pain but it should not be of the "this is definitely bad" type, if you get my meaning. Increasing the workload by lowering the box and maybe even adding some subtle weight increases should help you get back to form.
You should be proud of yourself for how you have tackled this injury. Good luck, mate.


