Frame Dents and Repair - Kinked, Dinged or Bent Top tube, Dent Down tube, etc

my mercian tt is dented, apparently there is fk all you can do short of replacing the tube.

i dont see why it cant be done tbh, it just needs some kind of cylinder expanding wedge inside, connected to a rod which can be accessed by the head tube/seat tube. should be possible.

I heard somewhere that you can drill a small hole, and scew something into it that'll allow you to pull the dent out of the tube?? Don't know anyone thats had it done though.