Thanks for your reply.
I would be running 6 cables from my SCR cable using a 6 way splitter 4 to my 4 tuners on my Gigablue Quad Plus then two to my 2 free sat tuners on my Sony TV.
Later on when I get my Gigablue 4k box that has two tuners I would reduce to 2 cables to my 4k sat box.
hope that makes more sense.
The reason i stated i would lose two tuners was due to Joe_90 saying the tuners may be incompatible so would only be able to use the two legacy outputs on the LNB.