Hey Bar! I know you're a blue tack maestro and it def works
Having all glass shelves the blue tack would drive me nuts though I like the idea of using a clear gel, hoping to eliminate the stands altogether to get a little more realistic display.
Well i was thinking about an alternate method of securing figures.
Picture the shelves made of a magnetic metal. And stands with magnets, but secured to the top(Stand would extend downwards and cradle the figure just behind the waist). Positionable anywhere, and the figure would just be held by the waist, but from above.
It could work.