I'm looking for some good suggestions on how to replace some broken
elements
on my Cushcraft A148-10 2m Yagi. They sell replacement parts, but I'm
told
that its cheaper to just use some welding rods as they are just about the
same size.

I noticed that on the Cushcraft antenna the elements appear to be
brazed(?)
at the center into an encapsulation. At the center of the encapsulatoin
is
a hole drilled for the screw to go down through the element and into the
boom.

How do would I recreate this if I were to use homebrew elements.
=========================
Not owning/knowing the above type of antenna ,I might not be eligible to
comment.
However from your description re welding rods and its centre being brazed
into an encapsulation , it appears to me that a welding rod is too thin to
drill a hole through ,but by sliding over a piece of (stainless ?) steel
tubing ,with inner diameter slightly larger than the diameter of the welding
rod , and brazing this in the middle of the welding rod material on both
sides (encapsulation) you get an overall larger diameter through which a
hole can be drilled.

Frank GM0CSZ / KN6WH