All the answers here are more or less correct. However that cap was tested to provide superior performance. The "other" brands cap boards often have "filters" or diodes where do not, hence our recommendation NOT to run them. Testing has already proven that one of our caps is often better performing than duals and even quads of other cap boards. In 17.5 however it won't be as large of an issue as the "ripple" current the cap is tasked with supporting is far less than say open mod.

There's nothing wrong with remote wiring the cap, as long as you understand you limit it's effectiveness the further you mount it from the ESC. I did a "how to" to show how to wire the RSX with various cap placements HERE.