Hi all!

Been looking around the forums for this one but seems tricky.
I am getting 10-14 seconds for 6x6 prints using my Durst m601 color head CLS66 80mm lens fully stepped down, highest f-stop at 18cmx18cm.
I cant just raise the head as mentioned by some to get more exposure time, since I want those 18x18cm prints.
Can I use the color head dials to introduce colors and reduce the intensity?
Can I use some kind of DIY material to put on the filter tray? What should I avoid doing?

I want longer times to get a better chance to control the steps in control strips and be able to perform the burn & dodging the way God intended it to.

Thank you in advance~