[542458]

I think you can do ever so slightly better by moving the pink dot to the highest pip on the 2x2 green cylinder - it extends a little beyond the pip, so you'd gain about a millimeter that way.

If it's not cheating to have parts not completely attached, you could maybe even balance the pink dot on top of the green cylinder for an extra 3-4mm.

[fiftyacorn]

if you dont have to be attached then place it under the blue brick

[anotheryou]

easier to balance on top, but I think it's not a "building" any more than.

[milkytron]

Maybe not a building, but still a structure ;)

[sjrd]

I had exactly those two ideas, even before looking at the solution proposed in the article :)