The big question is if the immigration officer regards you as a "genuine tourist" or no... You have not pushed it to the limit, as one extention seems to be OK. Think you will be fine.
from what I have read, it's this year they look to. So if you came here 2 times in 2025, you are under scrutiny even if these rules where implemented in November. But if they see you as a genuine tourist, and you have not used extentions 2 times, you will be fine.
Definitely by air... Would not take the chance on a border run by land, as heard some stories of people getting denied or only get 30 days exemption (not extention)