The medium works very well for a Line6-G30, offers secure and cushioned protection. I will admit to two minor modifications : 1) I sewed a small button to the back of it to allow me to button it to the strap slot/hole as extra security. 2) I did punch a hole in the buttom for the cord as I play in a church service and I love having easy access to the silent off feature. I'm about to order another to give me the option to use the stereo two amp feature for my 4003 Rick.