There are lots of tee to green errors, but the worst errors are on the green and fringe.
Why a 10 foot putt from the fringe selects 50 feet or a 20 footer selects 100 feet is beyond me.
The main problem is that many times the right putter scale is selected and just when you trust it too much and drop your guard it will select 25 foot scale for a 14 foot 3 down on tournament greens and then you are in trouble.
There are too many green speeds and too many putters with different scales to be worth it. You should just give up trying to accommodate them all and set every putt, fringe and green to whatever the shortest putt scale is.
That way players will learn that EVERY time they are on the green they have to select the right scale themselves. Since they have to double check and correct the caddie now, that won't be that big of a deal. This way at least if they forget to check they will be short and not across the green and no one will be able to blame the WGT caddie for the mistake.
The caddy is a cute thing, but it never enhances game play and only diminishes it when it gets it horribly wrong.
Thx for listenting.
TD