I have one of those on my HP Model C pull-down. It sits a bit lower than yours.
This was after I went though 4 (count em, 4) other HP screens from Da-Lite. One was the new (2.4) and others had a series of tightly aligned vertical stripes. I settled on this one as I was super tired of waiting and suffering the looks from my wife while swapping these on the wall for testing (133" diag), by myself!
It is quite evident/annoying on bright scenes, but I'll live. Sooo many other things to obsess over, know what I mean? Sorry if this is no help, but I wanted to express that this is not an obscure case.
JVC X750R, 133" DaLite HP (2.8 gain), OPPO UDP 203
Denon X4300H, DIYSoundGroup Fusion 15 L/C/R, Mirage FS V2 Surround, Mirage Omnisat V1 Surround/Atmos