Yes! You still want to be careful of overreaching - you don't want to put your center of gravity outside the footprint of the articulating ladder in extension.
The Work Platform has the same rating as your ladder. So if you have a 375 lbs rated ladder, this will support you up to 375 lbs. If your ladder is rated for 300 lbs, don't go higher than 300 lbs on the Work Platform.
It's not designed for the King Kombo, rather, the multi-purpose/articulating style - the round edges of the Work Platform are designed to help it rotate in and out as you climb past it in order to use it. I wouldn't recommend it on another style of ladder.
Thank you. I've now received my ladders and they are great. I'm really pleased with them. I can now see that the flatter rungs would not work well with the platform. Thank you for replying.