I don't know why you dont just try out the good old hacksaw approach? Both me and HandyAndy have created our chassis using the method, so far i've only had to replace one blade due to it getting dull.
As long as you get good quality blades it really doesnt take much effort to get a good clean straight cut and then a quick good with a file and you have a pretty much perfect edge.
If you then get sick of using the hacksaw you could decide then ask HandyAndy for the rest of the bits, at a reduced rate of course
