How to handle bowling on String and Free Fall lanes

In a USBC sanctioned league, bowlers using string and freefall pinsetters are treated similarly to a bowler who switches from right-handed to left-handed due to an injury, and then back again. 

Separate averages must be maintained for each hand to report to the association manager. Thus, you would create separate ID for each bowler: one for FreeFall and one for String. When the team bowls on String pinsetters, the String ID is used, and when bowling on FreeFall, the FreeFall ID is utilized.