pa tower viewer (#176)

calibration/pressure-advance-calib.md

@@ -36,7 +36,9 @@ The tower method may take a bit more time to complete, but it does not rely on t
 2. Examine each corner of the print and mark the height that yields the best overall result.
 3. In this example a height of 8 mm was selected, so the Pressure Advance value should be calculated as `PressureAdvanceStart + (PressureAdvanceStep x measured)`; example: `0 + (0.002 x 8) = 0.016`.  
    ![pa-tower](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/pa/pa-tower.jpg?raw=true)  
-   ![pa-tower-measure](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/pa/pa-tower-measure.jpg?raw=true)
+   ![pa-tower-preview](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/pa/pa-tower-preview.png?raw=true)  
+   ![pa-tower-measure](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/pa/pa-tower-measure.jpg?raw=true)  
+   ![pa-tower-measure](https://github.com/OrcaSlicer/OrcaSlicer_WIKI/blob/main/images/pa/pa-tower-measure.png?raw=true)
 
 > [!TIP]
 > @ItsDeidara has created an HTML tool to help with these calculations. Check it out if you find the equations confusing: [Orca-Slicer-Assistant](https://github.com/ItsDeidara/Orca-Slicer-Assistant).