I needed to optimise the chain travel of my recumbent trike (Terratrike Cruiser) to make it more efficient.
This envolved to modify the chain line and therefore the entry angle of the chain on pedal rings.
The drawback was the front derrailleur position had to be changed ... but the frame tube it is fixed on is obviously not movable.
This is where M200 provided me a great help : I designed on 3D software a new derrailleur support that can be angularly adjusted... and simply printed it ! ... even with a strange shape. ;)
... and yes, IT WORKS !!!!
(printed in Z-Ultrat / 0,14mm)