I was hitting with a prince textreme tour 310 and recently moved to a technifibre tf40 315 18x20. I absolutely love this racquet but I have developed tennis elbow. I have experimented with different strings and lower tensions but still having issues. I have hit 18x20 in the textreme tour 305 and 2015 texrene 100p and never had issues. is it possible my arm does not get along with this racquet?