I'm picking up my Kaiyen this weekend and before I put it in our lake I want to have the bunks on my vertical lift pre adjusted to fit my boat and I need to have the center of gravity in the middle of the lift.

My question is.... is there a way to locate the center of gravity of my boat in relation to where it sits on the trailer?

I understand there should be a minimum of 10 - 15% tongue weight, but would the center of gravity be in the middle of the tandem axles, slightly towards the front axle or another area?

Is there a simple 'standard' or 'rule of thumb' on how to calculate this?