Does anyone have a Mono Guitar Sleeve gig bag?

I need a gig bag that is light and thin but has a front pocket big enough to take a music book (12″ long by 8″ wide) and a small toolkit (2″ deep). I’m thinking of the Mono Guitar Sleeve but I’m not sure about the front pocket size and no local store has one in stock to see it in person.

Does anyone have one that they can measure the internal dimensions of the big pocket?

Also, the neck support thingy on the inside – with the shorter body size of many EBMM guitars, like the Silhouette Special, will the headstock sit a little low in the case or can the neck supoort thingy be adjusted?

Many many thanks!