Not completely incospicuous but they do not bother me at all. I only needed four of those in the end - 20 grams - to go with this bass from alright balance on a neoprene strap to great balance. I hindsight, they would have fit into the control cavity. They are not directly attached to the body for the most part. There is packing tape in between as they are very hard to take off once attached onto something. Cheaper than a high mass bridge, do not require a neck shim and cannot result i