With the latest Orion installed, core assets 4.1.6 package imported, and a scene with only a LMHeadMountedRig I cannot build a Unity project. I see errors from Assets\LeapMotion\Scripts\DataStructures\Deque.cs cannot convert uint to int. There are several other errors, but rather than copy them all here I figured I would post first to see if there is some known issue between this version of Unity and the latest Core Assets.