Quote Originally Posted by s_r_shaw
Yes, I have a colour head, so just assumed i flick the switch.

Does any body have any thoughts about glass vs glassless carriers. I've always used glassless for 35mm and found it fine. However, will the greater size of a 6x6 neg cause distortion with glassless carriers?

Having said that, the medium format negs that I am beginning to develop seem to lay completely flat, unlike 35mm which always seem to curl at the edges.
Always use a glass negative carrier--- or at least a half-glass one such as found in the Focomat Ic/Valloy enlargers. All this talk about alignment and APO or even 6-element enlarging objectives and yet glassless carriers? They might be fine for subminiature formats such as MINOX but even in KB-135 they deliver a suboptimal image quality.