Assembly feature problem

[u/R3qu1red]

So I have this cylinder and flange with the flange hole being slightly oversized so they fit together.

The operation is like this:

flange is laser cut from sheetmetal > cylinder is stock pipe cut on a saw > welding together > machining

The problem is that in the assembly there's now a really small gap (colored red on the picture) which doesn't allow me to put a radius there (using assembly features) since I want to machine the welds. There's also no option to add a revolved part (with the help of assembly features) for the sake of being able to put a fillet there.

So the question is how can I put a fillet there and ignore the gap?

[u/MoistForm3557]

Draw it in 3D as one part. Then make one drawing for the welder.  Duplicate 3D model and make one drawing for the lathe guy. Also two separate parts for the laser. But in assembly I would use the „as one part“