Something to consider, just about every pepsi can alcohol stove I've made is not only significantly lighter (by a factor of 10 or so) than a Trangia burner, they also burn more efficiently. I know it's only 100 grams or so, but it comes at no cost, and you actually get a better burner out of it.

If you don't want to invest in a new tent, but still want something lighter, you can try buying a 9X9 bit of Tyvek and using it as a tarp. Tarp camping is a bit different than tent camping, you have to be pickier about site location. You do however get great weight savings, my bit of tyvek with tie out loops cost me maybe $15 in materials, and only weights 500 grams.

Ditch outright the towel and rags, you can make due without them, I don't think you'll need brake pads, they don't fail suddenly.

For clothing, think about it in terms of functionality. I usually bring one rain garment, one insulation garment, and two base layers. I might be generous with socks, but I rarely find the need for more than that. Long fingered bike gloves can double as insulation.