There were changes to the control of the player drone made for 1.7 .. one of these results in a "neither below or above" behavior that prevents you from (for example) drilling a hole straight down. If this is intentional I can live with it (thanks for the fun game) but if it isn't it sure would be great to get back the level of control we had before 1.7 release ... being able to do everything beats being able to do everything except for a pair of conic projections with a critical angle of ~10 degrees... 8^)
When you have the drone launched press the O key (AutoLevel) to switch to the second control mode. Before: After (it can move to any angle the pic is just 1 example): ====