Quadcopter Tcopter

I felt this drone showed the best innovative design and it starts with the lower body and ends with the arms. I modified the arm connection to the body and made a 190mm arm for those 10 inch props.
I then modified the lower body so you can use this as a tri-quad (T-Copter) or a standard Quad.

YES, YOU NOW CAN HAVE your cake and eat it too. LARGE, SMALL & Racing.
Review the file called "Ed final lower base"

This will reduce cost of replacing parts. The next step would be making an insert for different motors. I give all the kudos and acknowledgement to Tamas for making this awesome TQ250 copter and allowing everyone to create remixes. Tamas feel free to copy and rename these files to your website.
If the prints are too large, you can print half of a design and then use a solder iron and a piece of 3d material, weld it back together if it helps the newbies.

The copter in the picture uses the famous KK2 board originally used for the T-copter shown on Youtube