Here is a custom made Flexi-Coil air Cart Fine Meter roller with a Custom Helical Twist. Meant to be the same as a #7245 but with a helical twist.

This should fit models 1330, 1720, 1740, 2320, 2340, 2640, 2850, 3174, 3234, 3350, 3450, 3850, 4350.

This is said to provide more even seed distribution as the seed will slowly roll off rather than all at once.

I can supply these in other colours if interested. Can also make in extra fine, and corse if needed. Can also custom make for other males and models.