             path:FDb.algoAid,
             json:aidJson)
         
-        let aid:MGridAlgoItemAid = MGridAlgoItemAid(
+        let aid:MGridAlgoAidItem = MGridAlgoAidItem(
             firebaseId:aidId,
             firebaseAid:firebaseAid)
         

    
    func createBug(
        location:CLLocation,
        force:Bool) -> MGridAlgoItemHostileBug?
    {
        if !force
        {

            path:FDb.algoBug,
            json:bugJson)
        
        let bug:MGridAlgoHostileBugItem = MGridAlgoHostileBugItem(
            firebaseId:bugId,
            firebaseBug:firebaseBug)
        
        return bug
    }
    
    func createAid(location:CLLocation) -> MGridAlgoAidItem?
    {
        if !shouldCreate(difficulty:kAidDifficulty)
        {
