That should be possible.
Right now here is the list of unique ratios for Ls:
+--------------+
| Aspect Ratio |
+--------------+
| 2.76 |
| 2.75 |
| 2.60 |
| 2.55 |
| 2.53 |
| 2.50 |
| 2.45 |
| 2.40 |
| 2.35 |
| 2.30 |
| 2.25 |
| 2.21 |
| 2.20 |
| 2.15 |
| 2.12 |
| 2.10 |
| 2.00 |
| 1.95 |
| 1.92 |
| 1.90 |
| 1.85 |
| 1.84 |
| 1.80 |
| 1.78 |
| 1.77 |
| 1.75 |
| 1.70 |
| 1.66 |
| 1.65 |
| 1.60 |
| 1.58 |
| 1.57 |
| 1.56 |
| 1.55 |
| 1.50 |
| 1.38 |
| 1.37 |
| 1.33 |
| 1.20 |
| 0.75 |
+--------------+
A drop-down combo-box would help?
Julien