I would like some advice from you more experienced folk, I am infusing an odd shaped panel, se image, and would like to know the best place to put the vac and resin lines? The sheet will be a decorative piece in 195g c/f. Thanks.

The issue may not be the feed spiral, it may be the surface you are using. How thick is the ally sheet and how is it fixed to the bench? when you pull vac the sheet can lift/bend very slightly leaving a void between the CF and the mould surface. The resin will not flow into this void leaving a dry patch. I have had the same issue when trying to use a 3 mm sheet of glass for flat sheet.

Thanks, I will watch for that

Not sure I really understand why a flexing panel would make a difference if the stack and vacuum is directly on the panel but thanks for the tip, I wll watch carefully on the next try.