I have the exact same net and have not had any dramas getting trebles out of it. Even though its quite small it can still handle a large Flathead!!
I'm off to catch the one that got away luv!!
Yak PB's: Flathead 71cm, Bream 30cm, Whiting 39cm, Luderick 35cm
Koolie Minnow Victims: Flathead, Cod, Stingray, Luderick