I build proper 6x6 splitter boxes, anyhow a pal of mine was too mean to buy one off me so he bought a pair of these off ebay from those engineer without brains fools.
The design is flawed anyway, but the workmanship on these is a disgrace cardboard to shim the second pinion , cereal packet gaskets, hacked and ground faces , not machined no diff pegging etc etc
He promptly sold them off back on ebay to portal rover in whose hands they failed almost immediately.
I contacted the builders and told him he was a disgrace but I got no comment