Congrats on the Bull.
On the K3 belt, the length of the accessory webbing was a design limitation. Because of the velcro attachment system of the hipbelt to the lower I couldn't have the webbing run all the way to the back of it like we did on K2. It would have been constantly pulling on the velcro trying to peel it off the lower wings.
The K4 features two Molle panels now so you'll be able to run at least two accessories per side if you wanted. Over time we'll come out with a small compliment of accessories for attachments there. When we launch we'll have our standard hipbelt pouch, the Nalgene holder and most likely a low profile pocket for a cell phone.