I had clearance problems with the rails used to mount the Rambo board in the MendelMax 3.0 kit. So I created the mounting parts, shown in yellow in the photo, that provide a much better fit. The top extension adds 1 cm reach so the mounting rail doesn't hit against the Y stepper motor mount. I created slots in this part so you don't have to get them mounted perfectly.

Print two of each part. You'll also need the following:

• 4 M3 x 16 screws
• 6 M3 nuts
• 4 M3 x 8 screws

Insert two M3 nuts into the back of each Rambo Nut Retainer part. Then use two M3 x 8 screws to attach these to the top rail, as shown in the photo.

Use the M3 x 16 screws and nuts to attach the Rambo board to the slots in Rambo Post part, and also using the Rambo Standoff parts for the bottom rail.