I scaled up the swappable Mustang by 140%, ended up with a wingspan of about 57". I used the XL Scout power pack (2814 motor, 3200 mAh, 12x4.5), it flies rock solid and was trimmed perfectly. It was a bit sluggish, changed to a 12x6 prop, more zip for sure but only getting 2 1/2 minute flight times and not even flying it super aggressively. I welcome any thoughts or suggestions on how to improve it. Thanks.