Sir,
Your weight and how it is distributed is not an issue...just like anything that goes in a helicopter it is the weight, pure and simple that matters. Your question is to be commended, and to those who answered accordingly, commended as well.
But as per your last post, re: R44...do a weight and balance re the empty end of the gas tank...especially if you're carrying a couple mates around your own weight and I am not talking laterally.
As for the seats, although I believe they have different weight limits(haven't flown a 22 in years) the physics regarding their design doesn't change, so keep the hard stuff underneath to a minimum when Pax on board said seats.
Fly safe
BWB