I'm just wrapping up the wings on my -7 and I have not installed the stall warning kit, even though I have it sitting here. I just put some -3 rivets in the pre punched holes. I am installing a Garmin AOA pitot, and frankly didn't want two different alarms going off in the cockpit. My father has a stall warning tab on his Comanche and it has given nothing but trouble. In icing conditions it is the first thing to ice over (as it is not heated, unlike the pitot tube), in rain the switch gets moisture in it and shorts out, not to mention it's another water egress point to keep the corrosion gremlins happy. Oh, and it's TSO'ed. I think you are far better putting in just the AoA. I know an -8 builder here that installed both, and he now wishes he didn't install the tab. Frankly it's just 6oz of unnecessary weight (I just weighted everything) not to mention the time to install and future maintenance. If you are worried about not having redundancy in the case you forget to take the pitot cover off, I am putting a key on my pitot cover. Without this key engaged in the panel, the starter will not operate, i.e. You can't start until you have taken the pitot cover off, unless you hand prop. Also, if some reason your pitot blocks in flight, just fly your normal final approach speeds on your GPS, but ensure you are flying into wind, then you'll always have an airspeed above your regular level and thus a margin of safety.
If anyone wants to come and get a free stall warning tab, you are welcome to it, the only problem is you'll have to come all the way to Tasmania to collect it, and you may have to buck a few rivets for me whilst you are here.
Tom.