This will probably appaul the continuous springy beam folks but when you have individual springs on a chassis it is important to be able to adjust them so that the effective weight on each wheel is similar. I had some problems with my J39 which would hold the track then 'turning right' but not 'turning left'. It was suggested that perhaps the springing on the front axle was uneven so I decided to build a rig to try and check this out.

An £7 set of electronic scales was purchased off ebay (I'm still expecting a raid from the drug squad as I'm sure this is the only other use for this sort of thing) and then a weigh bridge formed for brass square tube was soldered up. The tube sits over the scales with a moving section which supports one wheel only on the balance plate of the scales. This allowed me to confirm that there was indeed a 20g difference between the left and right hand fron wheel. A tweak to adjust the spring end-stops on the Bradwell chassis and things are much better.

The D16/3 is now in black, maybe post a picture later.

David