All this cost is time!
Take time to place the speakers correctly, mm makes a difference. I like the flashlight method that is in the tweaks forum. After that, movements side-to-side and front-to-back in small increments to lock in the soundstage are well worth the time. Check the toe-in with the flashlight method again as it will change. Do all of the above with the lame little flat feet. Add the spikes after the positioning is finalized and the soundstage is locked-in.