Short answer... yes and yes.
The actuators I am using are a Chinese clone of the Linak LA36 actuator, each having a load capacity of 3400N and dual Hall sensor feedback. Much cheaper and virtually identical to the Linak actuators.
I have inspected them internally and am impressed with their quality. Not the quietest, but that is probably to be expected, as they are industrial actuators with all metal gears.
The controllers I am using were designed specifically for Linak and are normally only available through them. The controller has the ability to synchronize 4 x 20A actuators in both directions and has inbuilt safety features.
This is mandatory for my roof lift actuators, as I have a hard sided pop-top, but I have a second identical controller that I will use for the bed lift.
The reason for using the second controller on the bed lift is the built in safety features, like stopping all actuators if one should fail and over current protection, but it's not really necessary.
The controllers also add the ability to utilize a momentary switch to start and stop actuator travel, which is ideal for lazy people like me that don't want to hold the switch down while the actuators are in motion.
Linak now make their "IC" range of actuators, which have the inbuilt ability to synchronize, but from what I have seen/heard, the external controller is more reliable and more predictable in its functionality.
As I said... you don't need a controller for a bed lift, nor do you really have to worry about keeping the actuators synchronized.
An actuator based bed lift system can also allow you to level the bed, if parked on uneven ground.
The bed lift in the Blismobil expedition campers definitely have that functionality.
