A video tweeted by @onleaks appears to show 3D CAD images of the new iPad mini 4, which support previous rumors that the new device will shrink in thickness from 7.5 mm to 6.1mm. The precise renderings show the new iPad mini to have a similar form to the iPad Air 2 and a thickness of 6.13mm. Last month, KGI analyst Ming-Chi Kuo predicted the slimmer iPad mini 4 will also have updated internal components akin to those in the iPad Air 2, with Macotakara…