let centrifugeAdd = (/** @type {Internal.RecipesEventJS} */ event) => {
    // Remove this one recipe to avoid duplication - it will be replaced by a Gregtech copy
    event.remove({ mod: 'vintage', id: 'vintage:centrifugation/magma_cream'})
    
    // This centrifuge doesn't support input count, so we have to repeat the input item N times instead
    // Recipes with 9+ inputs already look bad in JEI
    // Ones with 18+ inputs are completely unreadable
    const maxInputCount = 18
    
    // Progression-relevant recipes that we don't want to make available too early
    const id_blacklist = ['gtceu:centrifuge/rubber_log_separation', 'gtceu:centrifuge/sticky_resin_separation']
	
	// nerfed version of the sticky resin recipe to allow easier processing a bit earlier
    event.recipes.vintage.centrifugation(
	  [
		  Item.of("gtceu:sticky_resin", 1).withChance(0.35), 
		  Item.of("gtceu:wood_dust", 1).withChance(0.1), 
		  Item.of("gtceu:carbon_dust", 1).withChance(0.05)
	  ], 
	  "tfc:wood/log/kapok",
	  200, // processing time
	  128 // minimum RPM
    )

    // Vintage Improvements centrifuge has no lid - all gas outputs will be lost
    const gas_blacklist = ['gtceu:methane', 'gtceu:oxygen', 'gtceu:hydrogen', 'gtceu:lpg', 'gtceu:helium']
    var wedone = false
    // Import some Gregtech centrifuging recipes to Vintage Improvements centrifuge
    event.forEachRecipe({ mod: 'gtceu', type: 'gtceu:centrifuge'}, (recipe) => {
        if (wedone == true) { return }
        // UGLY HACKS are used here to wrangle Gregtech recipes
        let recipe_json = JSON.parse(recipe.json)
        
        // Exclude all recipes that need more than LV
        let eu_cost = recipe_json.tickInputs.eu[0].content
        if (eu_cost > 32) {
            return
        }
        
        // Exclude blacklisted recipes
        if (id_blacklist.includes(String(recipe.id))) {
            return
        }
        
        // Exclude all recipes that take fluids, or take more than 1 item type
        if (!recipe_json.inputs.item || recipe_json.inputs.item.length != 1) {
            return
        }
        
        // Exclude all recipes that input more than 18 items
        let original_input_item = recipe_json.inputs.item[0]
        if (original_input_item.content.count > maxInputCount) {
            return
        }
        
        let original_output_items = recipe_json.outputs.item ? recipe_json.outputs.item : []
        let original_output_fluids = recipe_json.outputs.fluid ? recipe_json.outputs.fluid : []
        
        // Remove all gas outputs
        original_output_fluids = original_output_fluids.filter((f) => !gas_blacklist.includes(f.content.value[0].fluid))
        
        // Exclude recipes that have no output remaining after gases are removed
        if (!original_output_items.length) {
            return
        }
                
        // This recipe type doesn't support item ingridient amount - just repeat the ingridient enough times
        let ingredients = []
        for (let i = 0; i < original_input_item.content.count; i++) {
            ingredients.push(original_input_item.content.ingredient)
        }
        
        // Add output items and fluids to results
        let results = []
        for (let i = 0; i < original_output_items.length; i++) {
            let output = original_output_items[i] 
            let outFluid = original_output_fluids[i]    
            if (wedone == true) { return }
            
            console.log("RECIPE CHECK " + String(recipe.id))
            if (String(recipe.id).includes("netherrack") ) { break }
            if (String(recipe.id).includes("oilsands") ) { break }
            if (String(recipe.id).includes("endstone") ) { break }
            if (String(recipe.id).includes("rare_earth") ) { break }
            if (String(recipe.id).includes("ash_separation") ){ break }
            if (String(recipe.id).includes("quartz_sand") ){ break }
            if (String(recipe.id).includes("grass_block") ){ break } 
            if (String(recipe.id).includes("mycelium") ){ break }    
            if (String(recipe.id).includes("dirt") ){ break } 
            if (String(recipe.id).includes("spessartine") ){ break } 
            console.log("CHECKLIST " + output.content.ingredient.item + " " + output.content.count + " ")
            console.log(JSON.stringify(output))

            results.push(Item.of(output.content.ingredient.item, output.count).withChance(output.chance / 10000))
            
        }
        if (wedone == true) { return }
        
       
        // Runs fast, but needs to be stopped for loading and unloading - clunky to use
        let duration = recipe_json.duration / 2
        
        // 64 RPM (128 SU) for ULV, 128 RPM (256 SU) for LV
        let rpm = eu_cost > 8 ? 128 : 64
        
       event.recipes.vintage.centrifugation(results, ingredients, duration).minimalRPM(rpm)
    })
}