Hi guys,
These kits are somewhat unfairly maligned. Most of the problems stem from not understanding the criticality of sealing things that were left unsealed with the old "oil screw" scheme which must be disabled to install the lip seal. However, as Dick suggests, there is one chronic problem with the location of the seal itself.
I have, as Dick indicates, come up with a solution which makes the kit more or less foolproof in this particular area. It's implementation is just a bit too much to describe here, but if you'll get in touch with me through the private contact function, I'm sure we can work something out.
Bill Wardlow
Motorbill
From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon