recipes.remove(<IC2:reactorVentDiamond:1>);
recipes.addShaped(<IC2:reactorVentDiamond:1>,[
[<minecraft:iron_bars>, <IC2:reactorVent:1>, <minecraft:iron_bars>],
[<minecraft:iron_bars>, <ore:gemDiamond>, <minecraft:iron_bars>],
[<minecraft:iron_bars>, <IC2:reactorVent:1>...