We just added another mod to our collection of "budget" mechanical mods. The Smoktech Magneto is certainly the best mod any of us have yet tried in this price range - it's really outstanding and lives up to the positive reviews. It telescopes to accept 18350, 18490, 18500, and 18650 batteries. The biggest difference, generally speaking, between high-end expensive mods and the cheaper models is the build quality (primarily the quality of the switch and the machining of the threads). However, despite this fitting into a lower price range, the machining is solid and the magnetic switch is absolutely excellent. It's currently available in stainless steel and gold and sells for $50.99 with free shipping!