Now take the card template again and position it as shown in pic5 with edge AB passing through ptX.
Draw in the line BX and as per pic 6 you now have your bird’s mouth.
Move the template as per pic7 so point B lays over point I.
Draw in the line AB for a total length of your desired overhang (remember to allow for the fascia thickness). This will give you a result as per pic 8.
Move the template again so its CD edge passes through the end of the desired overhang line as per pic 9.
Draw in the line on edge CD and you now have you bottom end plumb cut marked out as per pic 10.
One post to go: working out the ridge board position.
p { margin-bottom: 0.25cm; line-height: 120% }
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