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Must use a load more water would rinse quicker but you would still make the same amount of passes over the glass when scrubbing. Could be good for fascias on a tap. If you do give it a try have to let us no how it goes.
I borrowed a 4 jetted Gardiner 45cm wide brush. This was fitted with 1.4mm jets which are less than half the size of 2mm jets.Those jets gave that brush a good flow of water, although the brush head was too heavy for me.
I can't see how fitting 4 jets will make a difference on a standard size brush tbh. That 45cm brush is designed to have 4 jets.