If you bought a Nottingham Tactical TiClicker® prior to 2/10/2019, you will need to ship the pen back to us in order for this kit to work. There is a bushing inside the pen that stops the ink cartridge from rattling around that has to be relocated for this adapter kit to work. Once we relocate the bushing, the pen will then work with either the G2 Mini ink or the Schmidt ink. When you send your pen back to have this change made, we will also service the clicker mechanism at no charge. If you purchase this kit and your pen was purchased before 2/10/2019, use promo code g2upgrade to get $10.00 off your shipping. (this will cover shipping your pen back to us) After you purchase this product, your pen needs to be shipped back to us at the address below. Be sure and put a copy of your order in the box showing your order number and shipping address.