ORIGINAL: flyboy2610
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One other tip. It's too late for the PT40, but helpful for your next plane. Before installing the firewall, mount the engine mount to the blind nuts and trim the bolts flush with the back of the nuts. Then remove the engine mount and install the firewall. You want the bolts flush so they don't puncture the fuel tank, and it is easier to trim them off outside the plane.
When you say puncturing the fueltank, you mean in a crash right?
Well, i got a Dremel tool with some stuff to round of metal and stuff. Perhaps that will smoothen the bolts. If nothing else, i can place some rubber hats on them (pieces from a rubber tube) so they wont be too sharp. Or did i misunderstood
?