The ti inserts are made so the inside of the hub rest on the ti to avoid alum frame wear. To have enough ti material to bolt above and below that surface area to connect to the frame the ti has to extend or be exposed the dianmeter of that lock nut (last hub nut that is almost 20 mm in diameter) area. Some hubs are even wider there like small flange dura ace and surly. The locknuts on those hubs can be replace and they are so thick a spacer is need to if I recall. So it is a matter of getting those 4 holding screws of the ti insert away fron the center lock nut diameter to tie into the alum frame. I have thought about it and have not come up with a better idea. Not one has failed or worn out so I may leave well enough alone. They look big but weigh so very little. There is a lip on them that catches in the frame and the outside ti area cover the frame from any damage from the axle nut.