The BPlus was highly touted by some folks, and since I was in the build-phase of my “non-plus-ultra” setup around the Evo, it was worth a try. $70 later - 50% of which was postage - I am pretty sure it was an unnecessary distraction if it was to be used on the Evo.
The screen was created by enthusiasts of manual lever machines like LaPavoni and others that really cannot produce anywhere near 9 bar to properly extract espresso. This became clear after I pulled a few shots with it on my Evo. The structure of the screen is less important than the fact its thickness and structure physically displaces water volume in the group head during the brew cycle. Less water means more pressure, and that’s exactly what it does.
As a result, the manual machines with small boilers get the help they need, to bring the brew pressure closer to 9 bars.
However, if the screen is used with the Evo which already easily produces 11 bar, the effect on the drink is quite detrimental - more bitterness with flavors polarized, flavors of burnt are introduced and even very slight sourness from beans that I tasted sourness from before. A clean screen an basket may be nice, but I bought my Evo to make the best espresso, not prove a point.
So - as emphatically voiced by my good friend @“Like-Medium-Strong-Coffee”, “this dog don’t hunt” if you own an Evo. And that $70 should have been spent buying my darling wife a nice lunch.