Removing Play
In a nmber of places a ballbearing is hold in its place with a screw tapping straightly into the plastic frame, and a collar. In both the tail and at the collective pitch control arm there is space between the screw and the collar. I resolved this by putting 2-component 10 minute epoxy between the screw and the collar
In the head and tail there are also a few of these screws, in the head also using M3 bolts instead of selftapping screws. Apply the same procedure to remove all slop there too!
This is a well-known problem, and the well-known solution is to put tape at both sides of each guide. However, this looks not so nice. A less well-known solution is to put tape under the rod guide. Use textile tape (Tesa) which is quite thick, to do this. To get the rod guide over the tape, I temporarily attached some standard cellotape as well. The cellotape helps the rod guide gliding onto the textile tape, instead of being stuck against the side of it.
More recently I put green loctite under the rod guide. Green loctite has quite good gap filling capabilities and if you degrease the boom and rod guides properly this holds very well.
I had this play on my new raptor V2. A common known problem when having play here
is when you put the tail pulley flange (BK0051) the wrong way round. However I had
it right but there was a little sideways play, maybe half a millimeter or less.
To get this play out, I cut a washer from a sheet of overheadprojector plastic,
and put it at the outside of the bearing, to push the bearing inwards a little.
