and with out a pencil and paper
keep in mind that you can post a link to a graphic hosted elsewhere. If you need to draw a piccy, do so, scan, and link.
I can't believe the number of red herrings here:
one of the minor problems for those with more in depth backgrounds. However, one of the ways for folks to learn is to work through discussions such as we see on Tech Log, particularly if the minor (and sometimes not so minor) errors are challenged and eventually resolved. We are fortunate in that there are some VERY technically competent folk who choose to play in this particular sandpit ...