Purchased in the evening, shipped within the following hours and arrived in 1 to 2 days.
Currently 84 iGrip installed on a Vee Snowshoes XXL 5.05'' PSC (white compound) in the front and 76 installed on a 4.8 Surly Lou'' in the back (my fatbike frame was too tight for a tire as wide as the XXL).
I watched Larry Manuel's YouTube videos and followed his procedure. The hardest part is inserting the screws on the tool and keeping them straight (easier to tighten afterwards). Useful tip: a drop of MTB chain oil on the tool helps insert the screws more easily. The screws were a little more difficult to install on the XXL, and pre-drilling with the drill bit + drop of laundry soap was more necessary on the XXL than it was for the Lou ... unless it was only better skills with the experience during the 2nd tire. Important: the knobs must measure at least 6mm if you want to avoid crossing the casing. Success for me: 160 iGrips installed without crossing the tire, everything can still be mounted tubless without any issues.
Test-ride on very very icy trail: stable and predictable on flat terrains, uphill was now possible (even when pedestrains had trouble staing on their two feets) and downhill too... so much fun... I tried cornering and wow! For the moment I don't know if I will add the remaining 60 iGrips or keep them for backup in case some drop out. I did 6 to 8km on the asphalt to check, with hard brakings, and everything is still in place.
I'm going to upload photos & videos to iGrip Store's Facebook in case it helps.