Did someone mention my name?
Yes Welcome to the Forums.
Sure, I'll answer any questions that you might have, and yes, I thought that looked familiar.
I tried this setup on the Mamba Max also. It doesn't get along with it at all. I also contacted Castle and asked them if it would work BEFORE I bought the Mamba Max, they also told me that it would work. No Go!
The Quark handles this setup VERY well and even larger outrunner motors than this.
Please check out my "Direct Drive to Diff Revo Conversion" thread here in the Brushless thread. You might find it interesting as well.