Harvest Craft: Speed can it be cast or attack speed for remove and augment?

I looked everywhere but it seems I could not find the specific answer. I still find Harvest a bit confusing even though I played that league.

So if I ever came across a remove speed I could remove attack speed from my weapon. Then I would find an augment to try to get a better modifier since randomize only puts it in same low tier. However, if I add back speed there is a chance it will be cast speed on a weapon that can have that? Like a staff? thanks for any info.

Yes, "Speed" modifiers examples are "+x% atkSpd", "+x% movSpd" and "+x% castSpd". However, it must be possible for the item to craft it in the first place.

For example, you cannot use a "add caster" on a non-influenced bow in order to craft Spell Damage, despite it being a Caster modifier, because bows have a 0% chance to roll that modifier. You can, however, benchcraft a +x% spell damage or use an Essence in order to force the bow to have a +x% Spell Damage. You can then remove that modifier with a -Remove Caster (though you probably do not want to do it)

So, slamming a Speed Modifier on the weapon will probably give you a +x% atkSpd, but be wary both of the chance for it to roll +x% CastSpeed and its influences.

Craft of Exile can be EXTREMELY useful for you in order to find what modifers can a certain item with certain influences be able to roll

Ok I think that confirms I would just leave my weapon alone or think of another mod that might be more certain. thanks and I've definitely been on the improved craft site.