Grapthec tuned the gear ratios to each string position so that every string responds the same to any tuning adjustment.

You get fine tuning on the thicker core strings and coarser tuning on the thinner core; anywhere from 12:1 to 39:1 gear ratio. With Ratio®, one turn is about one tone change on all strings, making tuning, retuning and open tunings easier, quicker and more intuitive.

From £88 -£99 Chrome Black and Gold

Some stock in the cupboard,  but can be ordered for 2021