RE: DWE Micro P-38
The servo inserts, in my feeling, really make those nasty magnetic actuators workable. Not only due they keep the magnets centered inside the coil but they also eliminate the need to re-align things if the plane gets bumped. The control rod approach to magnetic actuators works very well and I have used it on many other micro-flight models successfully.
The servo inserts installed very well with little effort. Simply attach a magnet to each side of the center piece and then insert the center piece into the housing by opening it up a bit. I touched a couple tiny drops of medium CA, using a toothpick, on the insert housing where it meets the coil. I then dabbed a small touch of CA Kicker to harden it fast.
Since the kit does not include linkage, I created some tiny control horns from a piece of thin plastic.