Mark Well
Of course it’s great if you can saw square to a line, but using a jig or guide can save you time and money and give you good results.
Here's a simple dovetail marker which allows you to mark both 1:6 and 1:7 angles. They’re made from maple by well known Canadian maker Rob Cosman and available locally from woodworksupplies.com.au
The video shows you how it works.