I made a mold for a fiber glass engine cowl. 3 pieces of 2” thick pink foam laminated together. I was certain that making the mold would be a super simple and fast really job. I was wrong. Bad approach to the job. I originally traced the fire wall onto the mold blank and drew center lines. Then I started carving and sanding to a pleasing shape. But when I stuck it back on the fire wall I then realized I had goofed big time. Ended up with a bad case of droopy snout. The down thrust built into firewall threw every ting off. Versus starting all it over, I added shim material to the bottom till my center lines were back on the money and that it would center around the prop shaft. Then I did some reshaping.
Next time I will just use screws to hold the mold blank to the firewall and shape it while it’s attached.
There is about 3° down thrust and 2° right thrust on the engine now.