Finally crept over the finishing line! Rather pleasingly the 100th T5 was provided by a very special cache http://coord.info/GCA87C Jacob's MOVING Cache #1. Mind you, I am not sure quite why it has the T5 rating! I am not doing too badly on the other axis - just four more D4.5 required and I will have at least a 100 for every row and every column. Anyway, enough of all this - I now claim this having found and signed the log book back on 15th April 2014.