i used aluminum epoxy on mine. its sitting at home waiting for me to finish it up. i need to smooth the underside of the outlet that still has epoxy from sealing the slits and i need to take a flapper wheel to the inlet to smooth out the divot that i filled in. i dont plan on making the inlet any bigger since i just have a stock ported TB.

ill snap some pictures of it when i get home to show you what ive done. ill also snap a picture of the epoxy i got from napa.