I did not follow that filter thread much because I could not figure out what the problem with having cotton ( and a few twigs ) in there was... When I asked what people would suggest as proper filler I don't think anyone responded... So I did not even realize it was deleted...
There was a good post in there by Randy about a site which seemed to do a good job of comparing filters... wonder if that information is lost ?
A search for ' skinnerbox' will bring up the online engine manual for how to replace the valve stem seals.