John if you want to change to a standard size wire(one thats measured in inches ) all you have to do is pull the trunion out of the gear and drill out the hole slightly to fit the wire of your choice the Hobby King gear is a knock off of the LADO units so when splitting the cases just be careful not to disturb the other components and pull the trunion out with the electric gear those little geared motors can get clogged with debris so its best to drill them out of the cases if possible.

just make sure the set screw is out of the way and your good to go,I have also seen guys use a brass sleeve around a thinner wire to fit the hole.

I haven't looked at the HK gear first hand only pictures so I am not sure if the trunion is plastic or metal but it shouldn't take much to drill out the hole to fit your wire of choice,I am starting to move towards electric gear I love the plug and play aspect over mech. or pneumatic air gear.

I have LADO retracts in several planes and just ordered a conversion motors for some century Jet gear I have