Hi Brian, I bought ne of the latest models from Myford at Beston just before they closed, it is much better then the earlier ones but not perfect. It does hold the oil in the reservoir pretty well whereas the others leaked profusely. As for sealing with the nipples, well better but by no means perfect, there are a few posts on here with solutions to this but myself I just use the old dodge of putting a thin cotton cloth over the nipple and this prevents 95% of the leak.
Not tried any of the clones on offer so will be interesting to see what the team think
Regards John