Hi I wanted a hands free setup for the use of an iPad in the bed. SpiderArm was fitted to my needs except that it does not allow iPads with a back cover. So I got a cheap headrest mount for iPad from ebay that has a similar ball joint. Then I replaced the stock iPad cover from SpiderArm with ebay one. Although I had to apply a bit of sand paper to reduce the ball size to fit to the spiderArm, it worked just fine. Due to the arm length, spiderArm wobbles a bit, but overall, I like the quality of the product. If anyone is interested, I will send the link of the ebay mount. Now, my nect is free from pain while using iPad in the bed.