Hi Nick,
If I remember correctly, the LGV has a long transfer port, so there may not be anything to gain (indeed, maybe more to lose) by enlarging the TP. Maybe, if you really, really HAD to tinker, maybe radius the circumference ever so slightly, just to ensure smoother air flow?
One or two that I have tried were twangy and others were unbelievably smooth and quiet, so a lot depends on how yours shoots. If it was smooth, twang free and not dieselling, I think I'd be leaving alone.
A few months ago I shot Kieran Turner's....absolutely beautiful. All he'd done was strip, degrease, re-lube.....fantastic.
Enjoy your new toy!