I've got a Saito 72 in mine and had to put the battery in the tail section for proper balance (without adding weight). You will be a little heavier. You also will need taller gear - TNTlandinggear.com has taller SE gear. See my attached pic - it shows where I opened the fuse to install the battery. I will re-cover when I get the cg perfect - I'm still moving it back. My total weight (dry) is 5.5Lbs. Your .61 should be awesome! Let me know how she flys!