This is, I believe, the most significant of the replies posted above. I think racquet weight, grip size, and string tension are the important factors, out of which string tension is the most important one. Tennis elbow is just the inflammation of origin of muscles, tendons and bone at the outer elbow caused due to abnormal pressure. This is reduced if you alter the pressures (mostly stringing, grip size). Its more of a trial and error and you need to judge what suits you.
Give this a try: . You can buy Skinetex Kinesiology Tape online here: http://www.yumo.ca/shop/product-category/skinetex/ or http://maxsports.ca/store/skinetex-kinesiology-atheletic-tape-5m-roll.htm I have been suffering from tennis elbow for a long time from all the training and competing. This really helped me a lot especially when my tennis elbow started flaring up a few hours before competition. One strip of tape stretched down the forearm and I'm pain free to play. Here's a picture of me with that exact application for tennis elbow:
.... and for shin splints and for vastus medialis pain. International sports is obviously a tough business. Thanks for the info on KT. And thanks to the Ng bros. for representing Canada so well!