static void CheckSendModel(Player p, string modelName)
        {
            lock (SentCustomModels) {
                var sentModels = SentCustomModels[p.name];

                if (!sentModels.Contains(modelName))
                {
                    var storedModel = new StoredCustomModel(modelName);
                    if (storedModel.Exists())
                    {
                        storedModel.LoadFromFile();
                        storedModel.Define(p);
                        sentModels.Add(modelName);
                    }
                }
            }
        }