I think it's ruddy great mate, goes like a bat out of hell, you make me jealous and 44's are a great power/weight ratio saw. I love 44's.
46's are good to but climbing around a tree you certainly notice the different in wt.
I also think you should let us know down the track how it's going, like a week by week update for at least a month.
My 44 was mildy worked over by Rb & Co and after about 2 weeks is when it really kicked ass. I ran it in nicely with dino oil and it's a beauty.
It may not be as good as the one you got but till it busts I'll have to wait to get one like yours.
Would NW or yourself like to tell us what exactly was done to it and how much more power and reliability it has over stock.