Asymmetric chanfer

I’m working on a parallelogram solid part and I would wand to apply a 1:2 chanfer in edge (l1 = 20mm & l2 = 40mm)
How can I do this asymmetric chanfer ?

Thanks for help, sincerely

Hi Leo - you’ll have to build this in bits - could be painful - ChamferSrf will allow asymmetrical input, but problems will turn at corners and intersections of the edges. Not to mention all the trimming.