I have used one of these:
http://www.gunson.co.uk/product/G4008. and it works well with the M3W. I have set the tracking to 0 degrees and that seems to be good from a tyre wear and handling point, no tyre tread feathering. If you use the standard Avon SM tyres they do tend to feather and try to roll off the rim when pushed, they are not ideal. Blockleys or Excelsior tyres seem to be a better "traditional" option or there are several motorcycle tyres that give better performance but at the cost of very limited mileage. With Blockley tyres I have found that about 30 psi seems to be a reasonable compromise between ride and handling, although I have non standard shock absorbers that can be adjusted to compensate. The camber and caster angles are non adjustable with a standard set up, you can look at the Krazy Horse (Empire) suspension geometry correction kit if you want to optimise settings. It improves a bit on the now standard set up and vastly improved on the original pre 2014 suspension that the M3W came with then.
