Ah … Just a soupçon of concern creeping in now – is that bike used for much big gnarr / jumping malarkey? I can maybe just about see the potential for a bent steerer from a big stack. Somehow I’d not picked up you had already got a bit of excess tube, just that you would have.
That said, I’d have no worries about riding that on the normal range of ‘traditional’ XC stuff.
Just for completeness, (as I’ve taken the picture now 😉 ), and in case you change your mind about carbon, here’s a closer, (tho’ no more illustrative) shot of the pink/black stack on that Duncon up there ^. That’s a stainless bolt through it, rather than the aluminum one it came with, because I’m a show-pony about my fittings materials.
There’s another 10mm spacer between the bottom of the stem and the (also Hope) headset, (an’ that one is kinda black / grey and printed with skulls) …
Also in the picture (tho’ somewhat blurry through DoF, is my old Kona, showing his completely mis-matched stack of spacers – ~17mm of which are above the stem, 20mm below).