I think it is not the right time to use hypergravity, you are currently in a 'get back at it' phase.
Just think of hypergravity as a peaking tool. Save those 2-3 inches for when they will really make the change, taking you from 37 to 40 instead of, say, 32 to 35.
Also, it doesn't have to be an all-time PR period, it is not a one-off thing. If you feel after a few weeks of strength training you want to peak and test, go for it. Later in the season, when another peaking period comes, you can use it again.