RE: Marquet spinners
Robert,
Aero-Model Inc offers a line what they call Carbon-Lite spinners. They list a 63mm size. Could be worth a call to them for a full set of specs to see if it would work on the Spark.
Here's the link ...[link=https://www.aero-model.com/1_20_405/Accessories_Aero-Model-Carbon-Fiber-63mm-Spinner/AM%2063mm%20CL%20Spinner.html]Aero-Model 63mm spinner[/link]