Found this thread after some research on the subject, just about to order my hemocytometer and possibly some methylene violet if this vintage Sears 1200X microscope I found in my closet pans out. I'm skeptical about what my results will be just have to wait for the stain and polyurethane to dry (I made my new casing for the LED out of wood haha).
Old light was broken so quick trip to RadioShack and I now have a 9V system running a 10mm 3.5V 20mA LED which I'm assuming is bright enough.
But I loved reading every single post on this thread so helpful.
Aw man, I hate to continue to rain on your parade here, but it's also going to be VERY difficult to see stuff at high magnifications without fine X/Y controls on the stage, and it doesn't look like that scope has that. At 400x, which is good for cell counting, it's going to be quite frustrating moving the hemocytometer around with your fingers.
Good luck, and please let us know how it turns out. I suspect you're going to be scanning ebay for used scopes though