We got a look at N-Control\'s Avenger Controller Elite just last month, and the company is rounding out the hardware\'s May release with a full-court press on GameStop. The retailer\'s online store is now selling both the PlayStation 3 and Xbox 360 variants of the controller assist as straightforward, bundle-free $50 units. Company creator David Kotkin also tells us that the add-ons have had an extremely warm reception so far: although the Elite lineup had an unsung launch at GameStop on May 29th, it sold out on day one and is still in tight supply, with Xbox 360 examples currently on backorder as we write this. N-Control may have had a tough road in the past several months, but it looks as though that perseverance has paid off.