Jeff is about as good a calibrator as you will get and I recommend him or D-Nice. However if you want a new project and I know you like projects, get into 3D LUT Cube DYI calibrating. Jeff will probably do a 10 point grayscale and a 6 + 2 check points ( basic foliage & skin) CMS calibration for 2D ISF and Custom modes.
The link I show in my sig is for a normal calibration that Jeff will be doing, not a 3D LUT Cube calibration, but non the less you can compare numbers with my normal calibration to Jeff's calibration.
Make sure you have good air flow around the back of you VT50 once it is installed, and put a few hundred hours on your VT50 before Jeff comes.
I use my Realiser (AIX), SRM-727 and SR-009's about 85% of the time and love it.