combining main and delta fuel in one table

[pauldaytona]

For a two cylinder engine, there is one mainfuel table, and a delta table for the other cylinder. They both have a 16x16 table. Now it would be nice if the values of the main and delta table could be combined to show as the second cylinder. Where my main starts at 0xB097 the delta starts at 0xB198

So for the first cel the equation would be value is 0xB097 + 0xB198 - 128

The -128 is needed to get the right delta value.
Next cell then has 0xB098 + 0xB199 - 128 and so on.

In this case the address of the delta cel is mainfuel + 257 But I found the address formula in the help, but that gets a value of a fixed cell, not relative.
Also tried to use the function to get another xdf value but no success.

IS this not possible, Or am I looking wrong?