I run sericol EF inks in my Inca Spyder 320. So far, I like them well enough. The color is great. The ink jets well and we have had no problems with our heads. Adhesion is good on everything I run including coroplast. I have noticed that adhesion on acrylic is not as good as it could be but I am still able to print and rout acrylic without chipping or peeling. I run more polycarb than acrylic anyway. No concerns with polycarb whatsoever. Sericol recommends a adhesion promoter for acrylic but so far I have not had to use it.