I was looking at the case seeing rivits here and there and I seen there were screws. 21 screws to be exact, take them out and with just a wee bit of flexing the outside "band" the whole of the inside pops right out, as one whole unit. (only two of the screws are sort of hidden from plain sight and they are the front two, that are in the stand off channels you see in photo on front left as you look at it. ) very easy. 6 of them have counter sunk heads the 3 in back and 3 bottom left where inner frame attaches to the fan mount on bottom.
I have NO idea why they did not secure the HDD tray mounts with screws, but no, they used rivits, which when thinking about and how never every case I have laid eyes on has removable HDD trays and mounts. I scratch my head wondering why they did not use the same mounts like the fan mounts, side on end under the lip and on set screw on other side. but no.....
like I have said I'm in no hurry, but will try to sort out how I want to build and what to change with the case. we shall see.
Edited by MaN227 - 2/7/16 at 5:07pm