Balsa products is the only US importer, be alerted......

I have never used them either, no info was available from modelers.

I always open up metal gear servos to add a little slippery grease to preserve teeth and one of my 4 did not want to move smoothly after reassembly. Further analyzing showed me that there is no interlocking feature of the final output gear to the potentiameter shaft. It appears that it is only a friction fit but this may not last, how do they do it with the plastic gear?

I emailed blue bird directly and they are supposed to get me a more technical answer.

They run very smooth and quiet for a metal gear and very fast statically.

So the jury is still out if I loose this model from a servo failure oh well nothing ventured nothing gained. If they do work out they have something that is not available else where.