I noticed that Grizzly in the US have discontinued the G3616 (HM50 equivalent) and are discontinuing the G3617 (HM52 equivalent) so if anyone wants the online manuals it maybe the last chance to get them. The only difference is they have the R8 spindles instead of the NT30.
http://cdn0.grizzly.com/manuals/g3616_m.pdf
http://cdn0.grizzly.com/partslists/g3616_pl.pdf

http://cdn0.grizzly.com/manuals/g3617_m.pdf
http://cdn0.grizzly.com/partslists/g3617_pl.pdf

I have the copies on my computers, so If anyone needs them in the future just contact me and I will send them.

Not sure why they have dropped them off their line of mills, and I have noticed they have dropped other machines as well.
It might be something to do with the new Southbend range of machinery he is now selling?

Dave