I've implemented AMTimestampAccumulatorAB in STWidget and it looks mostly right! StripTool builds and runs, and the plot updates and appears to (mostly) display the correct values. There is a funny behavior seen in the first few points plotted when I've run StripTool a few times, too many points too close together.
I think the plot now displays scrolling behavior! The data stored max value is hardcoded right now (to fix) and depends on coordination between two AB classes to display properly (also to fix), but it works! Still displayed are the funny first few values.