"Leon" wrote in message
Can someone tell me how to make accurate 45 % cuts that actually fit
together nicely? I was building an deck and have some herringbone and

Making an accurate 45 degree cut is really no harder than making an
accurate
90 degree cut. What exactly is the problem that you are having? What saw
are you using?

I'm willing to bet that his "cheaper wood" is splintering a lot. Only
suggestion I can offer is to score it first with a razor knife.