Treading in the footsteps of giant, I am coming to the conclusion of my SuperSix build. 4ibanez, RyanH, Godzuki26, Nifty: geniuses.
One of the big spots for weight saving on a SS Evo HM build is on the standard bearings. The FSA SL ACB bearings, although don't last as long, weigh very little.
My bottom FSA SL ACB bearing sat just fine (oddly enough as Nifty never got his to work), but the top bearing has the outside of the bearing sitting proud by about 1.5-2.0 mm. The inner part of the bearing sits eeeextra low, so when I place the compression ring it requires some 6 microspacers (WEIGHT) for the slammed dust cover to push down on it. The dust cover then ends up sitting some 3 mm away from the frame (ugly AF).
This bike is a fun little WW project, hill climb bike, won't see bad weather, won't see crazy mileage (and if it did go out on a trip I'd swap the bearings around for the standard).
Is it too wrong to not have a dust cover and just have a 5mm or 10mm sitting directly on the compression ring, followed by the stem? If this isn't really an acceptable option, I will need to go down the route of having a custom dust cover made which has enough "drop" to kill away that 3mm gap.
As soon as I get some time I'll put together a build threat with more scale shots than anaconda.