Mike,
You can get the upgrade information at: http://www.tkdringmaster.com/upgrade_guide.htm
Because there are a number of versions of RingMaster they require different combinations of handgrips and cables. All versions require their encoder box upgraded which is done directly by the manufacturer. Depending on whether they have a support/upgrade contract they may or may not have to purchase the most recent version of RingMaster. We have tried to make it as inexpensive as possible to upgrade.
jay