3D tubing lisp challenge

Let me start this challenge with the statement that "I definitely am not a
lsp writer" and this post might be a little long.
In my recent self imposed crusade to find an automated routine to extrude a
shape along a path in 3d space using ACAD2004 has come up dry. I have
tested and tried over 20 different routines that I have found for extruding
and none will pass. I have and use a number of methods to do this "manually"
but all are very time consuming and full of places where errors and problems
creep in. The most evident thing I found was the vast number of people
looking for a similar thing. Personally I want to use it to make formed wire
parts & I have seen people looking for same for tubing, drainage pipe,
plumbing & wiring. All the lisp routines out on the web that I and others
have found don't work on 90% of what I need to do and were written back in
the early 90"s.
It is a very simple thing to make a "3d poly" and extrude a shape along its
length in 3d space as long as there is no radius requirements in the path.
A drawn arc can be turned into a lt weight poly but can't be joined to the
3d poly to form a continuous path which stops the ACAD extrusion process.
Here is the basis for the lisp challenge to whom wants to take it on.
(1.) Be able to group pick a series of lines & arcs drawn in free 3d space.
(2.) For the lack of better terms "Chain or Join" them into a useable path.
(3.) Pick a drawn shape or shapes at one end of this path to be extruded
along it.
(4.) Extrude this shape or shapes to be a solid so holes or cuts can be
subtracted from it.
Good luck and a bunch of people are looking...................
Tks
Gene