https://www.hopetech.com/_repository/1/documents/2017-RX4-Shimano-Instructions-Website-1.pdf
That tells me to use a Hope hose but not whether to use a BH59 or a BH90 Barb in it at the Shimano lever end
@Dibble started
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https://www.hopetech.com/_repository/1/documents/2017-RX4-Shimano-Instructions-Website-1.pdf