That's great! Long game is good too. It took us 1 year to fully integrate Magnus and Nobel. Just slow and steady. And mostly the last 5 month stretch was just us not wanting them out together unsupervised.That is very true.
Hopefully I can desensitize him to the older guy's movements and presence a bit more. I'll also have the kids spend extra time playing with him so he has an outlet (which playtime he of course needs anyway). I'll take the reintroductions slowly. I can't think of much else to try. My kids are super attached to him (as am I), so I'm willing to play the long game here. I'll let you guys know how it goes.