Should I retry duckbill installation?

I recently put on an OEM-style duckbill (noble TRD from import image racing), and I realized that the fitment is VERY slightly off (attached the spoiler a little bit too far forward). I only used 3M tape, no bolting on. Last image is a side view of my friend’s GR86 with a duckbill on.

Is this enough of a mess-up to inconvenient myself with taking off the spoiler and retrying? It will probably be a hard task but nothing a day of frustration can’t solve. I just want to see opinions on what others would do.