Down to the last two clues now but can't parse them. one is the sulphur clue and the other is the colony founder. Have everything else in the grid and have an option for each but can't decipher. A final nudge over the line would be greatly appreciated.
sulphur clue ...a "touch" is the small quantity you need...substance used in printing is the defn
usual 3 letter synonym for self- confidence ...middle letter is extra... and the box of tools is cist