I never had any issues with larger flies sizes up to 2 before adding the arm extension. Now I tie with it and it still ties great and there is a bit more space. I have two and when tying long articulated flies I position them together and that works great too. If I had fly tying talent then the planets would all be in alignment and wonderful things could happen. It is all I've used at home besides a early day forcep deal and three nights on a regal in a tying class. You will get great on what you use and know. Good luck.