To get a perfect 45 degree joint... do your best on the drop saw (or other) on the two sections of wood..'best' means the joint will not be perfect..right?. Start with two pieces that once joined will be too long.... Ok so glue them clamps and all nice and aligned.. (result yuck)..when the glue is done setting and not before...Return to the saw. Cut again the 45 down thru the centre line of the glued yuck joint....now you should have two perfectly matched cuts and go back to the gluing task again... If it fails...the extra wood allows this to be done again..!!
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