35 Bd2 was too passive and probably deserves a ?. While you were getting ready for your knight tour, don't you think he could have improved his drawing chances with 35 d4?
Afterwards, black is still better but it is hard to see you winning the game with the same extended knight maneuvers. Black has to worry about the c5 break disrupting his own pawn chain.
Here's a solid game with an interesting endgame. I hope you enjoy it. Of course, any constructive feedback is welcome.