My parents took care of everything they could before so we don't have to.
For dad we had to buy the casket and set the rest up.
Will do the same for dad.
The plot area they have don't allow stones.
They have the brass headstones in the ground and mow over them.
I don't like them.
I find them cold and impersonal.
As for your question, I think Its great.
Your husband remembered for his service in the military and you for your love of sewing.
All kinds of things are being put on stones today and so why not put what you want?
Weird? No! Not at all.