This is still excellent. We start the sync pulse just past the end of the vertical display data ticks. VGT is the vertical guard time required for the sync pulse. A few need two or three ticks of guard time, and it usually doesn't hurt to add that. Experience shows that a vertical sync pulse should be in the range of 50us and 300us.
Some makers like to quote their vertical framing parameters as timings rather than dot widths.
This is like a second guard time after the vertical sync pulse. It is often zero.