I don't know what has happened to my fitness just lately, but it's taken a landslide.  I managed to get my 50 burpees down to 2:57 a while back but 2 weeks ago it took me 5:06 to achieve the same amount of work.  Again today I still have only managed to recover it to 3:58.  It's a bit of set back but I am slowly ramping it back up again.  I have used some back off periods so I don't think it's a case of exceeding my work capacity.  Bollocks!
I have finally completed my sandbag.  After buying several different sizes, all either too big or too small I have settled for a 30" Canvas Toolbag.  It's a tiny bit too big, but I might bulk it out with some mini bags of wood chippings that I can interchange with mini bags of sand when I want to increase work capacity.
 
