see attached 3dm file.
The dk blue object between A and C sticks out a little and needs trimming flush to light blue and silver objects.
I dont in fact need the dkblue aft of centre of the radiused curve of the lightBlue item, silver and light blue are the shape required there anyway.
Thinking of Boolean difference it away using light blue and silver items, I can see failure looming as it feathers at A and C and at D.
Can someone show best way with this file attached to cut that portion away. Light blue and silver are the correct shape and to remain unaltered. I then plan on boolean union all three colours together.
There are times in life a strong intersection isnt reality. The ‘cutter’ gradually leaves the object to be cut,i.e.feathers away. I seem to find my shapes are often involving such.
What is best practice when such as here occurs ?
The resulting edges will receive a varying fillet radius. Making one object stick out to give a step cut not feather is introducing a step on what should be a perfect smooth edge, It might mess up fillet later on. Initially I had a cutting solid that booleaned fine but then I noticed it had left such a minute step at area C, I corrected it to a perfect flush fit, but then it failed ! so used trim and surface patching to make good instead.
I had wondered about slicing dkblue away with a vertical surface sheet running through left to right,A down to D, D being at where dkblue meets light blue at the radiused underside, but finding that exact spot at D and A to get a perfect joint also troubles me.
…and anyway, this illustrates a need for ||Boolean Difference, removing the dkblue with ltblue and silver items is job done, its what it needs.
best way boolean difference.3dm (282.6 KB)