The interest I have in flashing Lagrange Point, is it's the only way (besides a High-Def NES mod) to play the english translation on real hardware with sound, due to the custom Konami mapper on the cart (with an FM chip!)
My friend bought a repro of the Famicom Lagrange cart on Ebay, and you can play with the English translation and the VRC chip on actual hardware (provided you have a way of playing Fami games).