| Serial # Range | Summary of Change / Description | Part # | Doc # | Download Link |
|---|---|---|---|---|
| 26B000097 - CURRENT | GEN C - New housing design, proportional control capability | EFAAAC-*0*0 | INST-28055 | Download Manual |
| 73450 - 83450 | GEN B - Universal Housing/Boom Design | EFAAAB | 28030 | Download Manual |
| 73000 - 73449 | GEN A - Original Design | EFAAAA | 21820 | Download Manual |
