This xlerator pontiac firebird was purchased on e-bay for $29.00.  The chassis on the left

is the original xlerator chassis.  The next chassis was purchased from JAGS and has super ll brushholders installed.  The middle chassis has the magnatraction magnets and the drive

gear shaft installed.  This shaft was removed from the donor xlerator chassis.  The drive gear slips on this shaft and is held in place by the gearplate.  Use magnatraction brushes and brush springs in the cupholders.  The arm slips in and the gearplate snaps in place.  Be careful with the arm bushing were it fits in the gearplate as it is a loose slip fit.  The

magnatraction magnets may be tight height wise. Sand on 240 grit wet/dry sandpaper taped to a flat surface to fit.  You can also use the original xlerator magnets if you shim

them.  I found a plastic nylon automotive oil drain plug gasket is about the right height

and can be trimmed to fit.  The rear axle is afx long and a standard crown gear used.

I used aj's on the back and cigarbox aluminum on the front.  The front axle is afx long

with pick-up springs slipped on the axle  between the wheel and chassis.  The pick-up

shoes and springs are t-jet.  Stretch the pickup springs about 1/3 more than stock as this

set-up needs good electrical contact. This car will run smooth at low speed , have good acceleration and  topend. I have about a dozen of these hybrids that I race and win against the new JL tuff-ones. For super high performance the xlerator 12 ohm armature can be rewound  for about $25.00 by Alan Galinko to 6 ohms.  Grumps makes a higher drive gear that can be used with a tuff-ones crown gear.