The 49er Class has an excellent guide to setting up and tuning a 49er / FX rig. See FX Class Rig Tuning Guide
Over time experienced sailors will develop and fine tune the fastest settings for the carbon rig. The following provides a good guide to help you get going.
FX Rig Tuning
| Light | Turns | Medium | Turns | Heavy | |
| Forestay | 26.5 | 30.5 | 33 | ||
| Lowers D1 | 15.5 | 2 | 21 | 2 | 22 |
| Shrouds D2 | 30.5 | 6 | 33.5 | 14 | 37.5 |
| Uppers D3 | 16.5 | 18 | 3 holes up | 6 | |
| Pre bend | 20mm | 20mm | 25mm |
Tips from 49er / FX sailors: