I used the laser trick too. Works great, but one time I melted my left cornea. Huge bummer.
Nah, I haven't melted anything, and I can see the incremental advantage of laser-sighting speaker placement. But it (almost) goes without saying -- anyone that reads this thread and decides to try it -- do NOT sit in the LP to confirm that you have the angle just right with the laser on.
That's an unneeded warning for most folks, but plenty of kids read these threads, as does the occasional adult in the middle of a very happy hour, so better safe than sorry.
Every once in a while, completely inexplicably, things actually go according to plan.