Hi there, I am running a Solidoodle 2 printer (Printrboard Rev E derivative), which I understand is further derived from Teensylu. I purchased a smart controller, with the Teensylu adapter, which required adding the Exp 1 header pins. I now have the board connected, but am getting no display on the panel (but it does light up). I downloaded the latest Marlin, which has the Solidoodle Printrboard as Motherboard 81, and also uncommented the "#define REPRAP_DISCOUNT_SMART_CONTROLLER". Unfortunately, when trying to compile I get errors with "BLEN_C not defined". Re-commenting this gets the code compiled, but blank LCD screen. Is there a library I need to install in the Marlin directory, or some other code changes required?