5-band Broadband Hexbeam details

I based my design on the following information found on WEB:

G3TXQ - author of Broadband Hexbeam
K4KIO - a lot of practical information about biulding the Hexbeam

XLS worksheet with my calculations using insulated wire + iterations based on measured data

Measured Rs and SWR for bands in the following order: 20m, 17m, 15m, 12m, 10m.
Even if the graphs show sometimes higher SWR, in reality the needle of the SWR meter hardly moves.

20 m band
17 m band
15 m band
12 m band
10 m band