Thanks JAS for the response.

It does not sound fair that such an important feature is available only when consumer buy the progbox.

I suppose Hacker bundles the progbox together with the ESC or better if they can make this setting available even without progbox.
Is this the way to force consumers to buy the progbox?

LVC setting is one of the basic essentials in electric setups, failure to get this right may even cause more serious in flight problems (and accident) to thousand dollars pattern planes. They really can not make this optional.