Brett Clarke has made an excellent video clip on how to improve the "reverse" serve. Brett played for Australia at 2000 Olympic Games, was Australian Men's Singles Champion in 1997 was known as having the best serves in the country for nearly 20 years.
To view the clip, Reverse serve by Brett Clarke
Brett has been living in Thailand for approx. 4 years and will be in Melbourne for one month from mid December. He and Mark Smythe will offer to run many group sessions in a 4 day period during his stay.
Brett may run a one hour Serving clinic in Glen Waverley/Melbourne or Croydon TT Association in early January.