Nozzle brush for felt pads 25x35x3mm

Simple remix for differently sized felt pads, as I was unable to get fuchsr's but like his brush design. If found that the added length of 10mm over the original design is an improvement as well. Final size is no longer suitable to stick a third part of the same size to the undersize, but tbh I tried that before and didn't see much use in doing that (YMMV).

You must use 100% genuine wool pads because anything else will melt; the black smears you get off polyester are not material you took off the nozzle… It's really difficult to find true/genuine woollen felt pads, virtually all are polyester and the information you get before buying them is often inaccurate ("felt" won't necessarily mean woollen felt). I'm in Germany/Austria and use pads from a manufacturer called adsamm, they sell the genuinely woollen ones only in a thickness of 2.5-3 mm, I use these. 

As suggested by fuchsr, I used a modifier box so the handle does not have top or bottom layers and just infill (which resulted in a slightly wobbly handle, but it works fine), but this optional. I used PETG.

Dimensions changed for felt pads in the dimensions of 25 x 35 x 3 mm, also reduced the height of the handle a bit.