Hi Bernard,
As and when you start to order parts for your possible Minnie build, do check both supplier’s prices for each individual part. Do not assume that they charge the same for parts, they do not. One supplier was, from memory, about 15-20% more expensive than the other on box full of parts that I ordered a few years ago. I have not compared the latest price lists, but the supplier with a number in their name was the more expensive of the two, on the parts I bought.
If you are going to build a Minnie, might I suggest you check very carefully the copper tube you are going to use for your boiler. There is/was a very suspect tube of the right size for a Minnie boiler about, the wall thickness being noticeably of variable thickness. This will cause all sorts of problems should you choose to use it.
chriStephens