My gravel vac is 100% unused since the last time I posted on this thread. I put a waterchange siphon in a filter sock, dial the valve down on the siphon, and clean the sandbed that way. It's still not a perfect solution with 200 micron socks, but it's fairly quick, easy, and effective compared to the gravel vac.
Adding Tiger Conchs fixed most of the sandbed issues for me anyway.
Check and see if your siphon has a valve to set the flow rate.
Also, you don't want to dig into the sand, you want to just barely touch the sand.