Houghy..I got Star optics on the gold coast to have a look at it as I bought my Skyscan off them.....they found a worn washer that was just ground out by all the grease...they also adjusted everything for me and put some high quality grease back in...it's given it about 30% less friction....still a small amount of backlash but very minor..have no slop either which is great....might train the drives and do a drift align tonight...or I might just do some more imaging instead...lol