we tried on a NG3, didn't work out to wel.
you can tell a NG1 form a UN1 very quick by counting the bolts on top of the box, the ones which keep the cases together, the UN1 has 8 the NG series had 7. renault rated the UN1 at <350nm and the NG3 and 5 <200nm
I have some very detailed measurements form the Un1 if someone wants those I can post them.
grtz Thomas