I hope you enjoy the cartridge, Lee.
Of all the different carts I have tried, I think Acutex stands heads and shoulders above all. It may be my setup, as I am using an SME 3009 early Series II and it is a mid mass arm. I don't know how the cart will fare on a low mass arm like the Black Widow. I know Acutex made some much better (and more expensive) carts, which were produced with low mass arms in mind, but those are long gone. Most of the research I have done indicates this particular cartridge will sound great on both low and mid mass arms.. I just hope you enjoy it as much as I do. Setup is critical on these carts, so if you have someone who has done a bunch of cartridge installations, I think that would be a big help. Also, I usually set tracking force around 2 grams for these in the beginning. You might be able to dial it down to 1.75 grams as the stylus settles in, but sibilance will be present if you don't get the alignment pretty darn close..
Please let me know what you think when you get her set up...