Go ahead, spoil yourself. When the RAMPS board in your R1+ bites the dust, splurge on the duet. This bracket lets you mount it in R1+ easily, and leaves a gap behind it for a blower to cool the board. Remember, you want to cool the bottom of a duet board rather than adding heatsinks to the drivers.

Modify it all you want, but don't sell this. If you do share this or a modified version, please cite your original source.