Thanks. I found them, there were only two, but the flange is off.

I just bought on eBay my first dslr, a Pentax Km. I have three lenses that have been in the closet with my K1000 for about four camera lifetimes...1 autofocus auto zoom Pentax film, a cheap Polaroid digital, then a Kodak z650 and my current Fuji that looks like but isn't a dslr.

I have a Vivitar 28-200 f 1:3.5-5.5, p/k-A mount, and, you guessed it, it has THE FLANGE that I have been reading about.

I will include a photo of it here, and I hope someone can tell me where the screws to remove it are. I have read about five threads about dremelling it, filing, hacksaw, and a clean removal. Maybe this flange is not too big. Some of the photos I've seen cover 180 degrees. This one is about
90.

Thank you in advance for your help.