Well !
They should not be so - because it makes it more difficult to replace one (part) without the other.
Persons who purchase "combined" units are setting themselves up for increased expense.
When one or the other "part" of any combined "unit" fails there is then a "need" to replace both.
They should not be so - because it makes it more difficult to replace one (part) without the other.
Persons who purchase "combined" units are setting themselves up for increased expense.
When one or the other "part" of any combined "unit" fails there is then a "need" to replace both.