I'm still waiting for my chassis to get here, but I did just get my Pioneer Mustang back from the Trans Am Proxy. Last year the motor limit was 18K and I used the NSR 17K Baby King in an inline configuration and was solidly in the bottom third. This year the motor limit is 21.5K So I'll switch to a Piranha motor set up as a sidewinder.
I will set up the Scalextrics as sidewinders because I felt that during testing last year the Mustang felt better as a sidewinder but I thought I would try to take advantage of the "Magnetic" effect and extra torque of the NSR motor over the Black Stripe motor which didn't pan out.