Bugout_Boy 
.....
As for what my big thing is though? For the past 7 ish years I’ve been obsessed with spearfishing. And given all that experience and my passion for engineering, I believe I can build a speargun that has some beneficial design.... 

Hey BB, along the lines of a two way street... you might be able to give Frenchie's  Fish wacker a mechanical upgrade!

If your first cut is too short... Take the second cut from the longer end... LBD