1. Two parts is welded and added to an assemly ( frame + chair)
2. Support brackets shall be added > it would be very convenient to use weldment + trim/extend
Problem: trim/extend does not work when I use "edit component" since the rest of the assembly cannot be selected in the trim/extend feature
How should I do this? To add frame + chair in the same part is not how it will actually be manufactured
In general terms, assembly is to assemble components (like fasteners being used to assemble two plates) whereas weldment is when you weld them.
So create you components in single part and build configuration to show them as pcs. Weldment are not meant for assembly.