J
J Pierce
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We now do very few pfms, but my technique for bridges works well and haven't had a bridge rock in years( I'm sure I'll regret that statement soon??) wax bridge, cut thin Section with blade and seal margins under scope, then close cut with PiKuplast resin,let cure, add spruces ( I break the Resevoir off red wax sprues,wax and seal them on, I use an 8 gauge clear plastic rod dipped in wax, then with a hot blade cut the sprues in a even line attach the runner bar And seal, invest,cast and fit.. I never fit to solid model in wax and good models and pins are crucial.Hope this helps