So overall weight changes per club?On constant length irons the swing weight, lie, and MOI are typically matched as well. Each club in the set swings exactly the same as the others if done correctly. It's VERY hard to convert standard irons to single length, but not too difficult if you build them with a set of heads made to be single length. Check out the pinhawk SL if you want to see the difference in specs in an iron set that is actually manufactured to be a single length. Tom Wishon has a set out now as well that look to give more custom fitters the option.