These frontier dishes are not 90cm. I forget the exact size but it was around 108 x 116cm and quite a beast along with the front section. I believe the "90" designation means it supposedly gives the equivalent of 90cm dishes.
I bought one and it was not really suitable for wall mount. The ground bracket doubled up as a wall mount. The arms were too splayed. If you are having it on the ground then you will be fine.
I ended up with a Triax dish and multi-bracket. Much tidier and lighter. I just cannot get as wide a range but no major deal TBH. And I kept my
Sky mini dish* but fed it through the 8-way diseqc to pick up the FTA HD.
Currently receiving 1W, 4/5E, 9/10E, 13E, 16E, 19E and 28E*.