adds version A parts

README.md

@@ -7,8 +7,9 @@ There are 2 variations of this mounting assembly which will be referred to as ve
 
 Version A consists of 4 parts:
 * holder.STL
-* 
+* t-top.STL
-*  (includes 2 parts)
+* t-left.STL
+* t-right.STL
 
 holder.STL should be printed face down as below. Be sure to **use** support material as this will certainly fail without. This part will most likely be very difficult to remove from the bed of the printer due to its high surface area.
 
@@ -18,12 +19,18 @@ Once everything is assembled, a square of velcro can be placed in the top of thi
 
 ![PCB fit inside holder.STL](images/pcb_fit3.png)
 
-blah.stl
+t-top.STL should be printed in the following orientation. It will produce 1 usable part but actually has 3 separate parts as far as CURA (or any other STL viewer/slicer) is concerned. 2 of them are intended to act as specially made support for the primary part. Normal support material **must** also be used.
 
-blah.STL produces 2 usable parts but actually has 4 separate parts as far as CURA (or any other STL viewer/slicer) is concerned. They must be printed in the following orientation and **no** support material should be used.
+![t-top.STL orientation](images/t-top_orientation.png)
+
+t-left.STL and t-right.STL are simply mirrors of eachother. They must be printed in the following orientation and support material **should** be used.
+
+![t-left.STL and t-right.STL orientation](images/t-sides_orientation.png)
 
 ## Version B
 
+The reason this version is included here is in case there are problems with the fit of version A's dovetail joints due to using different filaments or different printers. Instead of requiring tight tollerence plastic-plastic connections, this version instead relies on four bolts to clamp onto the scooter's vertical tube.
+
 Version B consists of 3 parts:
 * holder3.STL (refer to version A)
 * arm3.STL