Fill to the "line" of the bottle where it starts to "shoulder" or taper in. If you go to Meguiars on line and search, you will find a thread that has photos of the correct point to fill to, (if that makes sense??).:xyxthumbs:
When it comes to electrical tools wattage is what counts, it is a direct correlation to the power differences when comparing tools (taking into account slightly different drive mechanisms). if you are talking "power", wattage is what counts!!. The Griots has a wattage rating of 30-40% higher...