Originally Posted by David Miller
Don't forget that the mechanical advantage will multiply the force on the line depending on how it's rigged. Could be 12:1 with two pulleys. Don't forget the PFD tied to the middle of the line in case something gives.
How do you get 12:1 with just two pulleys? Without using other directional changes like a bare carabiner?
I thought the 4:1 was the most bang for your buck with using just two prussiks and two pulleys.
On subject, OP, I would get the right gear. If you do need it you will be glad you have the strength and matched gear for the job.