This modification has not been done to make the slipper clutch look more like that of a Losi.  The fact of the matter is that the standard arrangement of using a stack of three disc-springs to load the friction plates is the very bugger of a thing to set properly.  You will hear owners of other cars glibly talking of adjusting the slipper by a quarter of a turn.  Do that with the Cobra clutch and you will have gone from solid to freely spinning.

So, the Losi spring has a lower rate than that of the disc-springs, making adjustment less critical and also giving greater stability of the setting when the plates and the gear start to wear.

The unit that is shown in the picture is manufactured in steel and I keep it tight on the thread using threadlock.  I seem to have lost the drawing so when I produce the next one I shall have to do a spot of reverse engineering on the prototype.  The next one will probably be made from nylon so that the thread is naturally tight.

Whilst we are looking at this area of the car, many Cobra owners give up ever obtaining the correct gear ratio simply because there is only the one spur gear available from Mardave.  In actual fact you can have a monster range of spur gears since any of those manufactured for the RC10 will fit.  Both cars use a 1/4" OD bearing at the centre of the spur gear.

VIEW GEAR RATIO CHART