toeside roll to revert

I posted about this trick a while back and got some good advice on how to do it. I landed it once but I think that was a fluke because many tries since then I have not got it back. In fact I think I pulled my abs on one of the tries. Anyhow I feel better now and am going back out to try again. My problem is this... when I come down to land I am either leaning too far back so that I just fall on my butt or I am landing so back foot heavy that my board slips out. Any ideas how I can make this better?