As I'm in the process of drawing the camera I'm planning to build, I have come up with a serious question. The only lens I've got (which is so far wonderful, I have know idea about performance or sharpness, but it has this hi-quality feeling and weight) is mounted on a 4"x4", not 100 mm but 4" squared. So, makes you wonder, what other lensboards are there? I know that there are a few different standard sizes, right? So far I think there is one that 4x4 (obviously) and one 140mmx140mm, anymore? If somebody could be so kind and tell me how many and which there are that would soothe my anxieties about building something that will prove quite meaningless. I'm still looking for a wide angle lens, so depending on which kind of lensboard that one will be mounted on and which size is the most common, I might have to change the drawing. Yeah, btw, googling and searching this forum just provides a lot of information on the sizes of the HOLES in the lensboards, not the lensboards themselves. On a separate note, is it just me or has google gone down hill the last 4 years or so?