Hi, I just received my CLE from a RFF member.
I've got several 50mm and 35mm lenses in LTM + both adapter and I found a Rokkor 40mm f/2. I'm happy.
The 40mm frame line is much much closer to the 35mm than the 28mm is. After testing my 35mm lenses with 35mm adapter, I decided to use the 50mm adapter. This way you have to consider that the 35mm is just out of the 40mm lines. With 28mm frame lines you have no idea where the 35mm can be, IMO.