Quick bonnet conversion question- half way through!

[topcat1]

Hi guys, I've done part of the work on my own bonnet conversion, I've turned a pair of ally bosses and cut the corners out roughly, it all sits nicely in the closed position and I can open it a few inches so I know the geometry is good, however I need to trim some of the front lip so it actually opens further.

The orange circle is basically the radius from the centre hinge point, so I believe I need to trim the red hatched area, what I'm not sure about is how far towards the middle of the bonnet I need to go! I'm hoping a couple of inches either end, fading quickly to nothing (moving towards middle) is all I need to cut, can anyone who has done the conversion confirm this please? I'm using M8 rose joints by the way.

Many thanks.

[smighall]

I cut approx 20mm off the across the whole width of the bonnet

[topcat1]

Wow so practically the entire thick lip on the bottom, I'll start trimming and keep mocking it up I think, thanks