Curious why so large? Why not get .093 tubes? Haven't seen anyone do it before but I'd imagine just get the tubes to run as true as possible and get a carbide tip or full carbide drill bit and bore them out use some cutting oil as you go. I suggested carbide drill because not sure how hard the tubes are and you don't want to snap off a bit in the tube or it might be ruined. I've heard the bigger .093 lines will make your engine run Alil rough wonder how his will be let us know how it turns out for him curious myself if it effects anything.