[Uggers]

Thanks Fizzlemizz,

I have this a try;

function MountManager:UNIT_SPELLCAST_SUCCEEDED(event, unitTarget, spellName)
    if self.db.profile.autoNextMount and IsMounted() == true then
        self:GenerateMacro()
    end
end

a go, its not trigger of a successful case I don't think, its just picking up when I'm mounted, then it basically spam generates the macro in batches (throttled maybe?)

I guess it just need it to basically generate the macro upon a successful mount cast