MXL v67g Mods
The MXL V67g LDC mic is a decent mic as is, but it can be improved fairly easily with two mods. The first involves replacing all of the cheap capacitors in the signal path with higher quality caps, and the second involves opening up the head grill.
For even better results, the K-67 style Chinese capsule can be replaced with a better capsule, preferably with one wtih a flatter response. The K-67 style capsule has a peak in the response curve up around 8k, which gives it a somewhat brittle sound. The original Nueman U-67 mic had some EQ circuitry to smooth this peak out, which had the effect of noise reduction in the upper frequences, while the MXL 67G (and many other Chinese clone mics) do not have this EQ circuitry, so they can sound a bit bright and brittle.
So far, we have not replaced any capsules on any of my V67 mics, though we had two modded by someone else (Michael Joly), and these have some K-47 sytle capsules that sound great. We have used some K-47, K-12 and K-7 style capsules (from microphone-parts.com) on some other mods we have done ourself on other mics, and we are quite happy with them as well.