I have seen comments that this bracket is a compromise and might not work. I have to say it does the job perfectly well, but the only item required in the purchased package is the 5mm base plate which has parallel slots cut into it. Use this together with the motor mounting plate and one of the shaft couplers supplier with the EAF (not this kit) and two 35mm M4 allen head bolts (that you will need to purchase separately) and the EAF can be installed. The plate is only supported by these two bolts near the edge of the focuser, but because the coupled motor shaft also adds support to the EAF this appears adequate. The installed EAF appears to be operating smoothly and has helped produce some excellently focused images.