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Hi John, I really enjoyed this trip down memory lane. I hope you get some funding to expand the D4 production process and continue your product development journey. I bought a few A5 tools back in the 90s... wall hammer from Mountain Tools, CA / software from Outside, Hathersage, UK. Still have it. We met once... at a Big Wall Symposium in North Wales around 1999. You were drinking scotch and did not seen very keen to talk to a person wearing a TNF fleece! (Not an employee - a customer!) Best, Michael

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