In 42 years of trapping ,I have done my share of experimentation and hit a miss trial and error.
My trapline knowledge came from this and reading.No mentors ,videos,or computers .Trapline knowledge,was not shared as it is today.
Depending on the results of your trapline to pay bills,also changes ones perspective a bit---less playing around and more depending on what produces for you.
My methods of 330 use have been refined during the last 2 decades, my stubborness has resulted in my complete confidence in the sets I make.
I expect every 330 that I set to catch a beaver,and most times they do.
Tom