Hi @bnatal personally I use the New-UDGridLayout more information here:-
https://docs.universaldashboard.io/components/grid-layout
I was a tad gutted not to see the page designer built into 2.5.2 but there is an online version here:- https://uddesigner.azurewebsites.net/home
Just remember that the -LayoutJson parameter needs changing to just -Layout but basically design a page with just CARDS, then from the code generated add your code in there…I got a copy on github here:- https://github.com/psDevUK/psUniversalDashboard/blob/master/PagesGitHub/HomePage.ps1
This has a form in it that shows 3x3 inputs I hope this information steers you in the right direction 
let me know if I can be of more assistance.
Also just whilst I think of it, have you seen this post:-
[2.5.2] New-UDInput differently formatted
depending how long you been using UD this is what the formatting used to look like.