I've seen this gizmo. Some Aussie dude created it. Clever idea but isn't there some temperature loss without the brew basket cover and what effect does that have?My OXO Brew-8, right around the same wattage, drops the outlet voltage from 122.7 down to 120 whenever the boiler kicks in...just for your reference.
If you go search the home-barista.com forums as well, you can find numerous threads on the moccamaster and shower screen mods etc.
Relevant --> ? https://www.home-barista.com/brewing/shower-head-insert-for-technivorm-moccamaster-t75507.html
Here's a pricey little upgrade I saw in a Youtube video....