My gardiners jets have featured in several of my brushes....
If you do make one yourself, the other tesco brushes are only 1.49.
I like to turn them into a duo-trim by cutting the inner bristles short. That makes them better at scrubbing and the long bits get into all the frames and recesses.
Two holes, stick jets in, five minutes 1.49. Bargain. keep several spare. Have that 'new brush' feel every week! Thats what I do for the fishing pole.
I might try to stick my tucker brush on one of these days, as it knocks every other brush into a whatsit.