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So my T. Stirmi molted after hiding away for weeks and I am sexing a tarantula for the first time and I believe I have a male Stirmi. Have a look for yourselves and either confirm my results or tell me I’m wrong lol.
Man that's a wet molt!!! I agree with the ventral photo...its really easy with stirmis to tell if it's a Male. Especially when they are young like yours.