Looks like you got a nice ~100 point drop at +4. Great! Are you planning to follow up further today? I've found that Oberon's BG sometimes drops a bit more after +4, which could be delayed R action because the antibodies are gumming things up, or could be the normal Lantus nadir after the R helps get things started. Not really sure, but either way I like to get a +6 check.
We'll see what Wendy says, but I would suggest repeating this dose a couple more times to see what happens. Remember not to do R in the same cycle as a Lantus dose increase, though.