Shame I don't have a cut-off saw to hand. For lighter steel I use a rothenburger pipe cutter which is way easier than the hacksaw but those poles do look chunky. Did you actually do them with a hacksaw rather than freehand it with a grinder?
They came in a kit cut to size, all I need to do was bolt together. Only took an hour to build. I think I would use angle grinder with a cutting disc - you don't see the cut edge anyway
I'll drop the poles and hacksaw round and you can start cutting...