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What a hopeless setup - can't see how they would survive a less than text book landing. The wooden supports are flimsy as hell and move within the fuselage, so I have modified them - making some braces out of pieces of lolly stick which is strong yet light, epoxied in place.
The front mount for the bell crank snapped off last night when my youngest got hold of it so that was expoxied back on with a lolly stick underneath to support it - so much stiffer now and the nose wheel is locked in the down position rather than retracting slightly as the wood flexed.
I binned the rear cross-link rod and replicated the servo rod (mirror image set up) and then used my servo speed reducer's "reverse" function to reverse the operation of that servo and it works perfectly. They both lock in the down position now and I won't have the dreaded "Bob Martins" (squatting its are down like a dog with worms!) syndrome on spool-up that others have suffered.
Will post pics later :-)
Simon.