Bjorn Baal spent many months studying under the tutelage of Frank Bowman, learning the intricate ins and outs of making piston rings. It's only fitting the second iteration of Bowman Rings be called RMJ, short for Ring Master Junior.   
RMJ Machine Worx has been manufacturing Bowman rings since 2017.
Tune in to hear Bjorn talk about the ring business and what he likes to fly in his free time. 
Head over to https://rmjmachineworx.com/
 
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