As for taking continuous doses of aspirin; you also need to watch for tolerance. You can build a tolerance to aspirin just like any drug. Then you will have to take even more should you have any headache or other pain for which you take aspirin. (You also do not want to mix the aspirin with ibuprofen, don't know why, I just know there are warnings on the bottle.
As for aspirin improving numbness, as you know, we all feel it is less than a desirable choice with serious negatives. But, if its working for you great. I'd still discuss with my docs.
Numb fingers are the pits!!