The next .5 reduction I'll make is from the evening dose to keep the morning/evening dose ratio good. No, I haven't considered experimenting by removing the small evening dose and taking the whole lot in the morning. Having achieved symptom remission with low inflammation I'm not willing to accept the high likelihood of morning pain returning.

On the other hand, my risk of adrenal insufficiency is relatively low, having started on only 15mg and being on prednisolone for only 6 months so far, at age 65, I'm hoping gradual reduction of that small evening dose will keep adrenaline insufficiency risk low. Time will tell. We're all trying to balance various risks. My doctor agrees with the current plan.