Title. Most ship kits of the same type do not physically conflict on the model, it makes sense to enable the combination of those, especially given the price players pay for them.
Two examples
↓ These wing attachments
< These spike looking things
Combined (with microsoft paint)
Please, FDEV. I beg of you.
Two examples
↓ These wing attachments
Combined (with microsoft paint)
Please, FDEV. I beg of you.