Randy,
As you are aware I am by no means professional - However in my limited experience I have found it beneficial to retain patterns. I made patterns for my first rig out of hard paper from walmart...when it came time to build rig two I was able to use these as a base guideline, incorporate some changes I wanted and come up with a revised pattern far easier than the first round. It has helped me save significant amounts of leather on saddle 2. What I really liked is that I knew from saddle one that there were definite areas I wanted to change - Having the original patterns let me easily trace the old pattern, work out my changes and develop a 'corrected' pattern. I suspect I will never quit correcting my patterns!
My plan going forward is to use only one tree maker for consistency and develop two sets of guideline patterns - One for flat plate wade's and one for inskirt rigged wades.
Dale Harwood seems to be really pattern oriented and I like the idea he promotes of consistency...His DVD's are well worth watching if you can get ahold of them.
What I would like to know is what do makers use for template material? The hard paper I use isn't the best - What stands up better to moist leather and extended use?
Ron