This makes absolute no sense.
You already have 8 channels...
Like i said, the 1380 has 2 configurations
C,M,Y,K,lc,Lm
OR
C,C,M,M,Y,K
+White & White/Varnish
All you need to do is get them to convert the Light Cyan to Cyan and Light magenta to Magenta.
You'll still have your 1380 config and...