I just got my first enlarger. A Beseler Dichro 45s. It has a 4x5 mixing chamber. I'm printing 5x7 from Tri-x negs developed in xtol. The negs are good but print times are around 90 secs. This seems excessively long to me. I only used one other enlarger and the prints time were around 15 seconds. I don't have an instruction manual so not sure what setting I should use and what times to expect. Any help is appreciated.