After using Tonna’s portable version of the 9 element yagi on 2m for some years now, we realized that these antennas are suffering from permanent assembly and disassembly. We are going to use the upcoming HAM RADIO fair in Friedrichshafen to buy 4 new comparable yagis to replace the old ones. We are still not decided if we prefer 9el Tonna (non-portable), or the 7el WiMo DK7ZB-Design, or the 7el from DX-SR. It will mostly depend on the mechanical stability, as the dimensions and the gain of the antenna models in question are very similar. This decision will not be easy :-).