After what seems a mammoth session sanding and smoothing the panels, I can not get around to marking and then cutting them to size prior to panel raising. But, and this might come as no surprise, I hit another snag. It's that old chestnut, of finding some of the components the wrong size. There is a work-around, honest.
On a house-keeping matter, I'm using a different video editing piece of software after having to replace my main computer. Please let me know if I need to make any adjustments to editing.