The older Bachmann Mark 1,s certainly do not offer suitable close coupling,unless you mean the semi-permanent pipe-coupling,which, only if you want to keep a rake together, is ok but if you wish ,as most of us do,to change it from time is a pain. I use Kadees no.20. OK but not marvellous. They plug in. The best way I have seen is to replace the tension lock at one end only and replace with a shorter shank version (available accessory) and thus equip each of the rake on an every other basis. Roco 'kurzkupplung' will not work (I've tried) and ,similarly,neither do Fleischmann Profis.The profis however do an excellent job with Bachmann dmu. Are newer versions of the Mark one any different ? I don't know but I doubt it.