Filter looks fine/ok. Pleating adjacent what appears to be the seam pleat looks a little puro esque, but that's just aesthetics.
Also note this M1 center tube uses Champ's louvered/slotted design which has been discussed with some dissections recently. Like Clarcor/Baldwin, just a manufacturing design choice they use. I'd have no problem using a filter with that design.
The M1 is fairly typical Champ construction. With exception of more/better media and silicone adbv, reminds me of a Super Tech ST7317 I cut open years ago.
Also note what I call the crème dela crème of filter cutters, the Longacre. Nice.
Wondering how long (time frame) it took to get the 10k miles and what the MM read out was?
Thanks for the pics.