The trouble with the longer bristles is that they go out of shape easier compared with shorter ones,I know it can be a nightmare making even small changes with brushes with tooling etc you can look at a brush and say it needs this doing to it in an ideal world etc,though not as easy as that.
Why not just buy the Ultimate? It's light and has the shorter bristles. Only thing is it doesn't have the great stock shape of the Supreme.And whilst we're on a bout the Supreme, I also like how the stock stays perfectly flat compare to say a Superlite.