Slightly OT, but I hope you'll forgive me - if I were looking to model a LBSC location (which currently I'm not, because despite having lived for some time on Brighton territory my commitment to another, somewhat larger, pre-Grouping company leaves little scope for meddling in the affairs of others) I would find it extremely hard to resist the charms of Kemp Town. Not only is it a perfect encapsulation of an urban branch terminus, with all the usual facilities both passenger and goods that you would normally expect of a bucolic rural location, yet incongruously set in the midst of a townscape, but it genuinely features that hoary old model deus ex machina of an approach through a tunnel. Its potential drawback is that modelling the fully developed post-1873 layout really requires the unusual 4-way turnout which sat at the throat just outside the tunnel mouth; but as an addicted builder of complex trackwork (usually featuring a mixture of at least 2 gauges, broad and/or narrow), I actually find that an additional attraction. If nothing else I commend its history as a fascinating by-product of the mighty Brighton's rivalry with its eastern neighbour the London Chatham and Dover.