Cheez Pleez, all new handbuilt wheels will ping when you set off riding for the first time. You can put lateral stress on them when they are built to seat everything BUT even £1000’s worth of handbuilt wheels will ping, thats no bad on superstars part.
Regarding your forks, dont get hung up over 10mm, it will make the square root of **** all difference to you, you wont notice it, if anything it will improve the ride of the zesty.
I have just thrashed my flows on SS hubs for a week in the alps riding rediculously hard and they havent faulted, great wheels for the price, so good a friend is selling pro 2’s on 819’s as they are lighter, better rim width, better tyre profile and better for using tubeless.
Also go for the Merlin £300 revs RLT’s, great forks, again duly thrashed and still ace!