There stored in my workshop which does get cold at night is this no good?  Before I mixed they were in the house for couple of hours

Paul,

I keep my IN2 and AT30 stored at about 25 degrees and it lowers the viscosity significantly. You might want to try it but be prepared for a much faster infusuin; you will be taking action to slow the resin front down and I can't imagine that you will suffer tubing collapse.

Be interested to hear what others recommend about temperatures. Fred is a big advocate of heating moulds and I now do this as well.

JJ