2-3oz of top weight and a 2-3" pin will be very versatile. You can put the pin high or low, put the CG almost anywhere, and if you're not out of balance yet, a modestly sized weight hole will fix it. No craters needed.
They say that high top goes longer, just like longer pins. Dunno how true that is, and it's almost certainly irrelevant for strong asyms.
SH