I have seen a Coroner's report from a caravan rollover fatality that suggested extending the towball out had further increased the risk of losing control.
This may not apply in your situation, but could be worth more research as saving a few bucks in a hitch is cheaper than some alternatives.
Cheers
I think you'll find in a situation like above, moving the pivot and load further back is what may have increased the risk, just like a poorly positioned axle or load adds to the risk.
Just out of interest and for the sake of conversation.
If someone was to buy a vehicle second hand that the previous had fitted with a longer after market tongue too,how would they or would they even know any different or better regardless of whether they filled and drilled or purchased over the counter or from a garage sale ?
In an ideal situation you'd keep the pivot/ball as close to the rear axle as possible.