The Flush Base for Onefinity is an alternative to a 90 degree stepper base, arm, and attachment. 

It mounts on the top of the gantry where the Z Axis is and requires a regular Arm of and an Attachment. There should not be a disadvantage to getting a longer arm, as it will only project it higher creating more clearance. 

It is optimized for a Onefinity that does not have the aluminum block for the homing switch sensor, however it will still work with the Elite series, and just have some floating parts. In our testing this has not proved to be an issue. 

Shown in yellow to separate the product from other products and where it goes, but it is black like the picture following

3d rendering of what it would look like below.