How long should I wait to do H after doing 2mg of Subutex?

[LotCoolerIfUDid]

I took 2mg (1/4 of an 8mg) subutex @ noon when I was in withdrawal. I just realized I'm gonna score some H around 9 tonight. I haven't been taking subs a long time or anything so I don't have a lot built up. In fact I already feel half as good as I did when I took it at noon and it's now 3:30p (3.5hrs in). The H I'm getting is high quality too. Can I do some and get a rush/high at around 9 hours after only 2mg? I've read so many different things. I've read anywhere from a couple hours to a couple days. Anyone have any experience with these exact conditions?