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Will a titan add much or any weight (assuming it already has a threaded fork)
Titan is ~ 270g, adapter (~150g) and stem (~110g) would come out pretty much the same.
I am running one at the moment and it seems solid and hasn’t slipped.
Pakejotter-
I've had quills before and the same as you never had any problems. I was thinking a light bolt on stem with shim, star nut, top cap and bolt would come in more like 170 g all in as I've seen shims for 13g. The fork will not be threaded but I've seen a couple of build vids for these where they cut the steerer short and wind a thread on the the top.
EDIT: just realised you meant a quill to threadless adapter. I won't need one and if my fork was already threaded I'd go quill straight away as i don't fancy using an adapter.
Retro_Bastard
I think a something like a Titan would look great but I'm try to keep this one on a diet which is why I've not really considered a quill stem on this but i have no issue with them in use and this one is pretty