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I strongly doubt that you hit a tweaking wall with your attributes. Try:

making sure all of them are calculated correctly

working on your segmentation for wall proximity

perhaps tweaking how your bandwidth and size of k

Well I am not working on it at the moment. But by a wall I mean it will get a great deal more time consuming from here onward to improve.

Plus the gun has a very simple structure at the moment (which I don't want to mess with, because its beautiful).