First of all, what was it that bothered me about the base of the hall table carcass that I put together last week? It was simply that I'd miscalculated the width of the intermediate cross rails in the paneled "floor", which meant that the panels in the two end sections would not be centered:
Options: (a) leave it alone and don't worry about it; (b) try to cut a section of the LH rail away; (c) add a strip to the RH rail, or: (d) something else.
Option (a) is not possible: how could I not worry about it? I woke up at four in the morning worrying about it. Option (b) is clumsy and hard to do, as there is no obvious tool that can cut in the space available. Option (c) is easy enough to do, but still clumsy. It will have to be option (d).
Next, the positions of the pins are scribed on the drawer front. I've made a simple right angled table that can be clamped in the bench vise. This holds the fronts and sides for marking and cutting, as can be seen: