I had to investigate something self
if false:, the max range is limited to default length of the inserter
if true: not limt for max range
"uniform range" is a ambiguous, label.
you mean with "uniform range", tha all inserters have the same "MAX range" which is configured by "Max inserter range".
what I understand is :all inserters have the same range, what means if I set one to 1, all have 1.
I would name this, "use default max range" and set it to false. Description "If anabled, uses the default max range for the inserter type only."
But you could also omit this option, use max inserter range = 0 for this feature