I am hooked on learning Freecad. I haven't purchased a printer yet, but thought I should learn the design tools a bit to know if i will do much customer designing before a purchase. It could influence my decision on what printer to start with. The videos have been a huge help and my best resource. I am trying to understand how to add solids to design to build a small miter fence for and bandsaw (It did not come with one - yes I could build it from wood more quickly, but this is my way of learning).
The fence has two parts to print. The bar itself and the fence fixture. I wanted a simple key to align the two pieces so I can glue or screw them together. I started with the bar since it was easiest. I modeled and padded a simple rectangle as the first body. Then I selected the top face and sketched the key on top and padded it. So far so good. Here is what i am not clear about.
Is the key part of the bar as a single solid that can be printed?
Or
Do I need to do a Boolean operation to join the two pieces into a solid?
I did the latter and I guess it worked, but since their are lines at the seams of the pieces, I am unclear on this. Here is a screen shot that might help:
Thanks for any education you can provide me.

The fence has two parts to print. The bar itself and the fence fixture. I wanted a simple key to align the two pieces so I can glue or screw them together. I started with the bar since it was easiest. I modeled and padded a simple rectangle as the first body. Then I selected the top face and sketched the key on top and padded it. So far so good. Here is what i am not clear about.
Is the key part of the bar as a single solid that can be printed?
Or
Do I need to do a Boolean operation to join the two pieces into a solid?
I did the latter and I guess it worked, but since their are lines at the seams of the pieces, I am unclear on this. Here is a screen shot that might help:
Thanks for any education you can provide me.
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