I am using the Down and Locked conversion with Robart 630 series on my 41lb EDF DC-10. Love them. They are pulling a 4 wheel truck (about 1.5 lbs for the 4 wheels, struts and a couple brakes) up in about 12 seconds. Nice scale speed. They offer a faster motor for lighter setups. I am also using their sequencing controller for all the gear doors. The sequencer is set up so you can adjust servo end points for operation of gear doors and allows for door open/gear up/door close sequencing. It’s a great feeling knowing that if you can see the gear down there is no way its going to collapse on landing. Still using air for the brakes for now. Also, Mitch and Ron at Down and Locked were great to work with. Quality product.