Ok try the bomb hover on the other side, off the house using this view thingy.
http://www.youtube.com/watch?v=sCqexHJxsOM this lets you watch the bomb explode and lets you do a back flip right before the bomb explodes no more guessing! Also angle link before you do the view thingy slightly away from the fence doing this makes it so that the place you have to hover to is closer. I've gotten it in three bomb this way. A benefit of this is that you keep ISG also with isg try to keep as close to the top at all times, this will keep the unfortunate side effect from happening that you mentioned earlier.
The other way you can't do as a kid and all I have to say is keep as close to the top as you can with isg.
If you need a video or something explaining the top bit send me a message at youtube.com/speedzelda I'll happily make one for you and check out any videos you've got.
Try not to message me here because unfortunately I don't get on here as much as I should. Though if you really have to reply and I'll see it EVENTUALLY.