I have been working my way through the tutorials, getting aquainted with as many of the features of FreeCad. I have spent all day on the Lego Block Tutorial, only to be confounded by: "Pad: Result has multiple solids. This is not supported at this time." error. I searched through the forum for posts related to this error. I spent the better part of two hours reading through many of them. My take on the problem was that in V0.16 the pad function worked as described, but mysterious problems cropped up later in the drawing. I saw that people were being advised to only work with tutorials for V0,17 and above. Earlier in the week I worked through the toothbrush head stand. I thought about that and went back and checked the procedure. I believe we performed a similar task in producing the cylinder protrusions on the top face of that part. It worked flawlessly. The difference in creating those pads was that we selected the top face of the base part to create our sketch on. I am going to stay up and give this a try with the Lego Block. I will report the success or failure of this later.
Thanks for making me think.