Quote Originally Posted by ic-racer View Post
I make my masks out of that black opaque material that sheet film and paper comes in. I lay it on top of the glass held in place with some tape. I use that material because it is thin it won't damage the glass and it does not produce dust (like paper or cardboard might).
Do you mean you put the mask under the negative? Doesn't that make negatives edges bend out of focus? If all I need is that then my only worry is lens boards.

Quote Originally Posted by ic-racer View Post
I think that enlarger uses recessed SETOPLA boards.
Recessed or flat depending on focal length. I am little confused if M609 uses lens boards unique to it or if it shares them with other Dursts. I got the impression that they are same as other medium format Durst lens boards. I would really appreciate if someone could verify this.