Gentlemen:
I have done some reseach, and making your own shot is somewhat more involved than you might think. Please do not be diswaded, just be infromed.
I have found and excellent thread on making your own shot, the pitfalls and challanges. If I can find it again I will post it.
Be warned, this thread is from 2003 to present, so its at least 15 pages long, but there is a tremendous amount of good information there.
I do not mean to hi-jack this thread, and if neccesary we could start a new thread.
Further, If hot linking for information purposes is not allowed PM me and I will see what I can send you.
regards and all the best
R