i think you`ll be fine...sit on the bike and get someone else to take a picture from the same angle,iam pretty sure your arms and elbows will be wider,i have a 50ltr on my thou.ok a bigger bike but once iam on the road i dont know its thereĀ
....might be thats its just different to what your used to,give it a while and you wont know how you did without it...

One, is never going to be enough.....