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Secure the servo arm with an M2.5 x 6mm bolt and M2.5 shakeproof washer.
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Tighten firmly, doing your best to make sure that the servo's position is not changed.
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Sending T0 will select the left hotend.
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Sending T1 will select the right hotend.
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The left hotend should now be active.
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The right hotend should be active.
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Fix two PC4-M6 couplings onto the heatsink of the switching hotend.
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Cut the PTFE tubing to the length you need and slide one end into the heatsink and push the other end into your extruder.
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When up to temperature tighten the nozzles against the heatbreak.
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Make sure that the two bolts on the side of the heatsink are also tightened and are holding the heatbreak securely.
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Almost done!
Finish Line