• sprung suspension on the leading and middle axles
• working inside motion & valve i/s to o/s rocker arms

I've tried several different motor and gearbox combinations in KGVI. Currently it's fitted with a JH motor and a rather low ratio single stage gearbox which gives a scale top speed well in excess of 100mph when pulling 6 bogie coaches! The finish I've given KGVI is that typical of the class in the late 30's. 

Castle class No.5000 Launceston Castle - built from a Mitchell Design kit.

This model also features working inside motion & i/s to o/s valve rocker arms.
A standard 3-point compensation is employed with the driven rear axle rigid. It's powered by an original Portescap motor and low ratio gearbox combination which gives it a top speed in the high 80's when pulling 6 bogie coaches. This motor & gearbox has previously powered 4972 and 6000, which together have run some 10 real miles. I've lost track of 5000's mileage, but it must be approaching a similar amount.

Hall class No.4964 Rodwell Hall - built from a Springside kit.

A compensation system has been fitted to this model utilising a single point mounted floating sub-chassis for the leading and middle axles. A latter day Portescap motor and low ratio gearbox drives the rigidly mounted trailing axle, which gives the model considerable pulling power and scale top speed in the high 70s.

Grange class No.6800 Arlington Grange - built from a Mitchell Design kit.

This model features standard  3 point compensation: floating leading and middle axles with a rigid trailing axle. It's powered by a latter day Portescap motor and low ratio gearbox. I chose this combination for its low speed performance and pulling power. Its scale top speed is about 70mph, however the double-heading combination of 6800 and 4964 works well.