IMHO... as it applies to second stage manuf of 'new' vehicles... I agree with prev posts that if you already know you need a higher GVM of your 'new' vehicle when you are buying it then you did indeed buy the wrong one.
Two of our fleet vehicles at work have second stage GVM increases, one of our 200 series and one of our Rangers.
The 200 isn't too bad but the Ranger handles like a POS and is deadly for those who aren't aware it does NOT react anything like all the other Rangers we have.
We now only allow people who have been checked out on it to use it.