Review on 🔧 YIHUA Soldering Handpiece Station - Enhanced Replacement for Improved Performance by David Gibbs

I brought this YIHUA 907F soldering pen to have a spare at home in case/when the original runs out on my Yihua 939D+. A little recalibration was required to show the correct temperature, but that's to be expected when replacing the tip of a temperature-controlled soldering iron. Good thing so far! I only wish YIHUA would deign to publish the correct calibration procedure for the 939D+ instead of leaving it up to the buyer(s)!