Update README.md

README.md

@@ -21,7 +21,7 @@ The picture below will tell thousands words. Please left click / right click + o
 |**boom diameter**       | 5 cm (2 inch)   | 5 cm (2 inch)   | 3 inch          |
 
 ### About The Telescopic Element sizing
-Each of the element is constructed and simulated as a telescopic alumunium tubing. Telescopic taper sizing is consideres as **2 inch dia. alu. tubing at the center and 1/4 inch dia. alu. tubing at the tip** Taper schedule from the center to the tip can be adjusted to the alu. tubing dia. which can be purchased locally.
+Each of the element is constructed and simulated as a telescopic alumunium tubing. Telescopic taper sizing is consideres as **2 inch dia. alu. tubing at the center and 1/4 inch dia. alu. tubing at the tip (1-3/4 inch at the center and 1/2 inch at the tip for the 2-rev model)** Taper schedule from the center to the tip can be adjusted to the alu. tubing dia. which can be purchased locally.
 **The models are correct only for the taper sizing mentioned above. If you, for example, want to swap the taper sizing with another size, the model still can be constructed and be adjusted to your working freq but will not deliver the performances predicted in my models.**
 
 ### Tuning procedure: