Interesting that the latest newsletter includes the question of being able to convert mk1 bins to mk2 with the drainage cap. I have had problems with my mesh blocking up regularly and having to remove and clean so I have modified the mesh plate as follows. (My Hotbin is up on bricks so I can get a tray underneath to collect the large amount of leachate my bin produces, presumably because I use a large amount of grass cuttings). So I have removed the mesh plate and cut a hole in it just big enough to fit a water but tap into it. I drain the liquid of regularly into the tray and when full use it on my veg patch and rose's. Works a treat.