Wow! What a talented little guy!
My son also was an escape artist, but a little more towards 18 months, I must admit. I acutally lowered his side bar so there wasn't as much room between him and the floor when I saw it had become habit for him to climb out anyway. (My boy has also always been a dare devil... I think it comes from having 3 siblings 7, 10, and 11 years older than he is.)
I stopped letting him sleep in his crib and found a toddler bed for $10 on CraigsList the day I found him with his left leg tangled in his crib spindles and I couldn't get to him fast enough to get him untangled because he was panicked and wouldn't let me work with his legs because he just wanted me to pick him up. I was afraid I was going to break his little leg with all of his pulling. If I had it to do over again, I would have taken away the crib sooner.
Since his crib converts to a toddler bed already, convert it. I know that you will miss your sleep and quiet time... believe me, my son is in our bed at least twice a night... but it's better to think of his safety than your comfort. Besides, you are already up with your new baby (Congratulations) and with practice your little man will be back to sleeping in his own bed soon. That's the theory anyway.
Of course, for me that's a pipe dream since my son shares a room with us and seems to think that he can come and go as he pleases. I think in our case, we've adjusted to his schedule rather than him to ours. LOL.
Good luck!