The RiRi zips on the Eastman really put me off ..... sold both my B-3 and B-6 and changed them for Aero's, both 2nd hand and bought on ebay for less than £300.
The ELC B-3 and B-6 have never used RiRi zips.
BTW. the expensive nickel plated Swiss made RiRi zips used on the ELC Luftwaffe are the best zips in the world. Each tooth machined to perfection, both smooth and strong.
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