Maybe I am assuming that a subweldment should be able to do more than what it is supposed to do. I have a weldment & created a subweldment that consist of 3 parts (shown in the tan color).
1) I have created custom properties of the sub-weldment & a description called "Atmospheric Damper Take Off". This shows up as item 1.5 on the BOM.
2) I have created custom properties of the items under that sub-weldment. They do not show up. Shouldn't they show up to be something like 1.5.1, 1.5.2, 1.5.3, etc.?
You should be able to configure the BOM settings to show "Parts Only".