anchor.diff:  		if(!M || !redemption_mat)
   			return 0
   
  -		build_amount = min(build_amount, round(redemption_mat.amount / M))
  +		var/smeltable_sheets = round(redemption_mat.amount / M)
  +
  +		if(!smeltable_sheets)
  +			return 0
  +
  +		if(!build_amount)
  +			build_amount = smeltable_sheets
  +
  +		build_amount = min(build_amount, smeltable_sheets)
   
   	return build_amount
   
  
positive.code: 	if(exchange_parts(user, W))
  		return
  	if(default_pry_open(W))
  		return
  	if(default_unfasten_wrench(user, W))
  		return
  
negative.code: 	if(D.make_reagents.len)
  		return 0
  
  	var/build_amount = 0
  
  	for(var/mat_id in D.materials)
  		var/M = D.materials[mat_id]
  