Not sure how high you mean by "some height", i have to assume you mean more than 2, but 43mm aint very thick, to give you an idea, the top of my 10m mast is about that (40mm), the bottom 2 sections cant even take the Ecowitt U-Bolts.
To be fair, i did have my OS anny mounted to 3 fibreglass awning poles but it was flapping about in normal winds, didn't try it with decent winds, the oscillations would have played havoc with any readings. So whilst its doable, i dont recommend a makeshift fibreglass setup unless its a proper telescopic job (far more rigid) and guyed
FYI the Other Weather Station Hardware section would have been ok for this post i think