I have a tig too. We need to become friends I just don't have all the experience with building like you. I'd love to start. I have the time and toolsThe Sten is a fun build. If you are interested in one I'd get it soon. They are getting harder to find. I wish I'd have picked up another MK5 when Apex had them. Indianapolis Ordnance has a great semi auto kit. It's not a bad build. I need to weld my Mk3. I am waiting on my buddy to get his tig setup going. The mig was a little over kill. If it doesn't happen soon I'll mig this one too.