I am doing a blend in my 95 Cummins B-Series as follows (also it is about 95 degrees here in TX):
85% WVO
10% K1
5% RUG
Diesel Kleen® +Cetane Boost

When I first start in the morning it has a rough idle. When I idle at 1500 for about 3 minutes it smooths out. Then runs fine the rest of the day.

Do I raise the Cetane Boost or the K1???

Reduce the amount of VO till the idle isn't rough. Does it smoke when it runs rough?