tnx...sometimes I get lost in 3d lol

one more thing how would I be above the points and select them?
It seems that when I try to select a bunch of them I select the surface as well...and I need to do them one by one.

also attached sas.3dm is there a more efficient way to do this?
if I remember correctly did some sweep,,,in the middle offset the line both sides..boolean cut then blend...
what would be a more efficient approach?

another way I was thinking of doing this is to cut from a solid block with a "pipe" created by sweep and then fillet the edges...
now the other question I have is if I create a pipe by sweep or other method can I change the size between the start and the finish by a guide or scaling rail?
I saw it somewhere...

Tnx~