We bought a drifter for our 310 two seasons ago and absolutely love it. Many days on Lake Erie with 4-10 knot winds, and we can comfortable sail 0.5 to 0.6 wind speed rather than fighting the genoa. I know 2 knots in 4 is not much, but we are sailing, and the winds usually change. We can point as well as with the genoa; comfortably. Most importantly, Margie loves this sail.
Sobstad 1.5oz nylon, 155%, 388 sq ft, aspect 2.35:1 cut high for great visibility. I haven't re-rigged the second jib halyard, so we are flying inside the forestay for now but plan to rig the crane over the winter as we've just bought a used 0.75oz asymmetrical. As-rigged, it's easiest to raise downwind of course. Easy to tack, and if the winds climb, the sock helps manage without chaos. Sheets run back to stern cleats to plastic blocks attached with soft shackles so no banging on the gelcoat. Only a few minutes to rig and remove, so I always remove the sheets when leaving the boat. Sheets are attached to clew with soft shackles as well, saving weight and my head.
We did not have a sock until this year and can't believe how easy to handle vs. before. I highly recommend a sock day one. Sorry I missed seeing this and posting earlier. /Ed