True
With any trim device , be it a mechanical [ an aircraft elevator trim comes to mind here] or electrical trim input,
one usually like to see the trim [ in this case . a pot] to be near that 1/2 travel point when the spec is obtained ..Reasoning here is that trims should have
a +/- adjustment where 1/2 way would be considered zero trim..
Guess we could call this Trim Center..This allows trimming in either direction and if a trim is exactly at zero to obtain the desired specs, all the better...