ExplicitAffixes:
Level: 55, Category: ProjectileSpeed, InternalName: ProjectileSpeed4, DisplayName: of the Zephyr, IsHidden: False, IsPrefix: False, IsSuffix: True, Stats: Min: 34, Max: 41, Stat: BaseProjectileSpeedPosPct, Min: 0, Max: 0, Stat: 0, Min: 0, Max: 0, Stat: 0, Min: 0, Max: 0, Stat: 0, Values: 34
ExplicitStats:
BaseProjectileSpeedPosPct: 34
I'm not sure how it happens, but when I was looking at alt's amount, it was incremented after vendoring and after stashing the alts. You can check OnStash in your AlerterReloaded plugin

And According to the EB API, the event have everything you need (Count, Nameand Type ).
Code:
public static event EventHandler<OldGrindBot.OnStashEventArgs> OnStash;
public class OnStashEventArgs : EventArgs
{
public OnStashEventArgs(string name, string fullName, int count, string type, int itemLevel, Rarity rarity);
public int Count { get; set; }
public string FullName { get; set; }
public int ItemLevel { get; set; }
public string Name { get; set; }
public Rarity Rarity { get; set; }
public string Type { get; set; }
}
}