Who wants a free belt?

I like the Moose Heirloom messenger bag from The Leather Shop..





My perfect bag is a messenger/postal hybrid with the following specs.. 

• 3-4 lbs weight (I owned a saddleback for a couple years and the weight gets uncomfortable soon).
• 5-6 oz leather.
• No lining. 
• Just one compartment on the back for a laptop/tablet and few accessory slots on the front of that compartment.. 
• Postal bag type straps that are not on the sides but the back. This makes carrying the bag over the shoulder really comfortable.
• Carry handle
• 15"*11"*5" works out to be a good size. 
• Closure like the heirloom bag. Easy to work with and no leather to tear or rip at the buckle. 

Everything about this bag is amazing: kendalhyde.com/products/classic-satchel-new-design

-Vegetable tanned leather in a natural option
-Heavy, thick, leather
-Fits a large computer
-Minimalist design with no branding

I also think built in pen slots like the G briefcase is nice.

Billykirk Schoolboy - Medium brown

Likes:
The color - it's bright but not too bright, so it contrasts enough with most CXL products I have, and have seen around, like boots and belts
The size is perfect - Fits a 13 in. laptop snug but not too snug
The extremely minimal yet secure enough closure
The matching detachable leather shoulder strap (not pictured) attaches to the back and not the sides, making for more comfortable carry
The boxy design gives it a part-satchel / part-briefcase feel, which I feel like sets it apart from most satchels I see around... I feel like it's more classy
The fact that there's a handle
The fact that there are 2 compartments and that's that.

Dislikes:
I really wish all of the Schoolboys had brass hardware, and not the select few in dark brown they decided upon.
I wish the leather was a little thicker - I'm all for my leather goods to get scratched and scuffed, but if you're going to design a boxy satchel, give it the ounces to maintain the shape. You can really see this with the divider in the middle and the outside flap

Mixed feelings:
I really like that the handle can slide down to be somewhat flush with the top, or simply pulled up to carry, but take a look at the leather piece supporting it. While I fully trust Billykirk would take full responsibility to repair this if something were to tear, but I just don't trust this piece to last very long, if I were to carry the bag by its handle, decently full, day after day. So, while I love the design concept, this flaw really bothers me.

Liking this so far, thanks for the effort guys. I'm still working the bags in the back ground but I don't want to jump the gun. Nothing will get released until it's "right". These posts are helping with the "right" part.

i've not spent much time looking into leather messengers, mostly because if i'm going to wear/carry it around it's going to have to really conform to my body both loaded and empty. i've had a variety of messengers made from cordura, canvas, and some stuff made from recycled water bottles...but love the IDEA of a leather variety if it's flexible/supple enough to wear on my bike and toting around town.
the features i like in messengers:
either a center divider (width) or a pocket along the rear wall
an adjustable shoulder strap (key for when my load changes)
single exterior pocket under the flap
single small interior pocket or slot for a pen

Guys, sorry for being late to the game with the drawing. I've compiled the list and will get it done, just a lot going on this week.

THANK YOU to everyone who contributed.