Mainly changing the tube socket and deflection coil, as the case may be. Fields are generally static, and some have to be changed from parallel to series. The rows of coils should be directly welded first. If the line width is small, increase the reverse capacitance or change the correction inductance. If it's not enough, install a matcher. In other words, a similar autotransformer is added to the on-board scanning output to adjust the line width, and the tailgate socket needs to be replaced with multiple models and jumpers. If not, use the original one and make bold changes!