Here are some notes I have for the Black Mamba:
The Black Mamba moves the inner standoff out to control speed buildup and make some tricks more accessible. The trailing edge is flattened with equal length standoffs and the tow point moved out to control over steer. ISO moved out 3”, SO spacing 6 3/4”, TE offset ½” with 10 ¼ equal standoffs, bridle out ½”. Black Mamba settings work well on UL and Vent.
For comparison there is 3 ¼” TE offset with the original 8 1/4 inner, 11 outer standoffs.
Allen your 17.5 cm is right inline with the notes.
Kevin I love your drool smilie