In November 2017 I had the privilege of taking a personally guided tour with Zahren and Josh from Unseen Tours around the streets of KL.
Having visited the downtown area before, I was amazed at the amount of detail I'd missed. My tour navigated back streets, heritage buildings, political history (In a nerd) and the scenes of alleged ghost sightings, as well as filling me in on life on the streets of KL from the perspective of two people who've lived on them.
I enjoyed every minute of my 2.5 hours, which was all very walkable, and visited spots most tourists would miss.
I recommend flat shoes, an umbrella (to fend off rain and sun), water and lots of questions.
Zahren was charming, witty and genuine. No question was too dumb. This guy knows his stuff!
Best of luck with this venture, guys.
Hope to see you again next time I'm in KL.