Used the height finder for WM 6661 for 65” vesa 400 x 200, distance bottom of TV 10-12cm.Result: Drill lowest hole 84cm from the ground. The bottom of the TV will be 65cm from ground. When you follow the manual though you start with drilling the center highest hole. Hang the tv mount on this use the level and drill the other 4 holes.So It would be more logical if the height finder gives the height to the first hole you drill. So the center top NOT the bottom hole. Now you still need to measure the difference between bottom and top hole and add this to the shown outcome.The height finder is also not 100% precise because of the 2cm increments you choose between VESA and bottom of TV. It would be wise if the customer is advised of this discrepancy of the app.My TV is -with a little bit of of contemplation before I started drilling- hanging correctly on this very sturdy mount. It works very nice.Last tip for manual of WM 6661: Advise the customer if the tilt buttons don’t seem to operate they should give the tv a little lift from the bottom. This takes the weight of the tv off the mount. The buttons are now easy to operate.

Idee van de app is goed maar de lijst in dropdowns kan niet tot onder gescrolld worden waardoor niet alle opties kiesbaar zijn.