I tried the silicone brush mod and it seems to work. I haven't had any filament strings get past the brush so far. Bought this: https://www.amazon.com/gp/product/B07HDY86DN/ Says it handles up to 600F / 315c. Super easy to cut - the whole thing is silicone except the metal rod for the handle but it starts above where I cut it so I just sliced through with an razor. I cut down the bristles which made them stiffer (yes, it was initially installed on the wrong side).