Hi, I thought you were looking for praise of these scopes!
I can answer as I broke one of the fans on mine - and found an identical unit at Jaycar. But so far I have been too timid to change it out as it involves too much dis-assembly for one of my limited mechanical skills. For now I cut the power line to the broken fan and taped it up and just run with two. I think I will take the scope back to the supplier for a clean and ask them to fit the replacement fan. In fact I might ask them to reverse all the fans as I do not like the fact that the guards are all inside making the fans very easy to damage.