how generate the same holes" of transfers, inside the cylinder?

the idea its try to make something like this, where the holes,(transfers ports),. are inside the cylinder too

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I've already create the transfers with their respective ports

but when, the diam of the cilinder, is extruded., hapen something like this,

any solution for this?

also here is the file, if you want to take a look inside the program

SolidworksModeling And Assemblies