If you have a Freak kit, just buy a used back. They're usually around $20-$30. From a technical stand point, it's a good threading system. It's quick to screw in and out. It's useful for a quick clean when you have a break.
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Please ship to me using US Postal Service when shipping to Canada.
Don't ship to Canada? No worries--I can work it out with you: US Parcel Pickup