Luke,

Are you going to using the unit primarily as a CNC router or as a Plasma cutter?

I ask this question for several reasons, one, because I have just developed a retro fit plasma unit for my Eagle CNC machines which has thrown up some very interesting reading and testing. The main point being that Plasma is not as accurate as the nice videos make it look, it has an inherent problem in that the 'flame' is not straight, it is sort of egg shaped, which even on the very best plasma units will cause a bevel on the cut edges, in fact if it does leave a bevel on both edges the plasma unit is working properly!

Our unit will easily cut 3mm steel and 2mm aluminium but the finish on aluminium is not great, simply because aluminium does not cut well with a plasma torch. The finish on steel is great though but even then you have some work to do if you need to cut very small circles or arcs etc. I use Mach3 on the CNC units and for the plasma assemblies and its great but the second point is that if your plasma unit does not have an LCD amp display you will effectively be guessing at what amp the unit is working at and on very small circles the amps need to be a lot lower than when cutting straight lines.

I am familiar with all of the sellers below and they do produce some excellent work, especially PlasmaCam, but what they don't tell you or fail to mention is that on their video the torch is a T80 unit, which itself costs over £2000.00 in the UK and this lends itself to my third point. If you intend to work primarily with the Plasma unit, especially for small work, then do buy the very best Plasma unit you can get, it will be worth the expense. My units don't use the expensive plasma units because they are not aimed at those users who want super high precision, they are aimed more at the client who wants an affordable plasma unit that makes reasonably accurate cuts AND the plasma unit can be detached very easily to then allow CNC work.

I hope this helps, if you have specific questions you want to ask then maybe I can help further.

Colin.