[NLRS] Variable capacitor

[kg0vl at aol.com]

    Good evening.
Has anyone in the group worked with remote-driven motorized variable
capacitors?   Cold wx and gear reduction seems to be the biggest issue.
   Several years of old cassette motors deemed problematic, and was
looking for something different.  Any outlet on roughly a 400pf device
to withstand the cold and be controlled from the shack?

Thank you for your time.

73, de KG0VL
Jeffrey
(still at exile in Fairbanks.   Well, Fairbank, Iowa actually)