Thanks for the observation. If that is the case then a supplemental #5 filter may work. In fact the Durst CLS1840 Dichro head only went to 130M and came with a supplemental Magenta filter to go to 190M.
Originally Posted by cnmne
I'll follow this progress with interest.
It still seems to me that a timer circuit is easier to build (or buy) than a PWM dimmer. So, instead of setting blue and green intensity you set blue and green time. Basically it would could be split grade printing with the push of a single button.