Chest rigs are light and comfortable type of gear to carry magazines and a few small stuff, but if you want to carry more gear on your belt you will face a problem.
The weight of the additional gear will pull the belt down, making the whole thing very uncomfortable. You can put a harness to your belt to solve this problem, but this way you got at least two separate gears to wear, with two shoulder straps on each other. I wanted to solve the problem different, in the way that I got only one harness at the end. So I have replaced the original shoulder straps of my Eger chest rig, to a Smersh H yoke.
This way it also carries the weight of the gear on the tactical belt, such as canteens and buttpack.