This pic is why I Vectrex.So my next step will be to revisit my code between Day 2 and Day 3, and replicate the functionality whilst keeping my child beams to a minimum. I figure with the nature of my plots, I can aim for about 10 segments (possibly including 4 reflections before I need consider a beam will be "full" and a new child will be forced. This permits Vectrex Beam recalibration and will reduce wobble. Check out this second pic. I grabbed the camera as quick as I could as the screen was frying! You never get bugs so beautifully illustrated on any other games console! (and this is with a very low brightness setting and beam insensity set to $3F; about 25%.)
Not sure when the next session will be, as there may be an interlude as I try a new idea I've (just) had. I'll document that as I do it too, although I am sure I'll be back to continue this project within 7 days.