The noise issue, could it possibly be DIY tweaked with some resistor, lowering the sensitivity a bit?
But I guess it will be no problem for me, I have 2m distance from the top of the back-wall to the sofa.
I only saw the noise complaints from LSR308 owners, not the 305. I could be wrong. Mine are fine.
". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers