You got a picture?
Of the clay mock up?
Sadly not.. The clay I used cracked into bits..
So plan on making another.. And fibre glassing off it.. To make a bolt on/off duck spoiler for mine..
Thinking of drilling and adding 4 threaded inserts into the spoiler.. That way I can bolt the duck bit onto the spoiler lip with 4x bolts..
It wouldn't be full width.. And only about 1.5" high