Thanks Lazy,  I came across one of his designs (called the ultimate ....).  That link only had a link to a PDF that was near impossinble to import into any software without the need to manually trace over... which defeated the purpose as I was then back to trial and error.

Will try the SVG format... did try the SVG... exactly what I was after... thanks.

If your first cut is too short... Take the second cut from the longer end... LBD