Back when the 2 pieces were the only thing available, I used to put a light coat of RTV on 1 half, then use a front hub for locating while the 3 nuts and bolts were installed that held them together. Then I bought a DAP kart that had cast magnesium wheels and I found that I could change 3 tires in the same time it took to do 1 2-piece wheel. Then to separate the RTV 2-pieces, I found that a skinny putty knife and a hammer worked real good to separate.