Question about Hauck Stop N Safe 2 incl. 21 cm Extension

Hi, we have installed 4 of these barriers at our house using both the 21cm and 9cm extensions. We also have a 98cm walkway and we were worried that with the 21cm extension the gate was too long and with the 9cm extension it was just short. We decided to take the 21cm extension and cut it down to 14cm.