I certainly hope it’s not the same for all manufacturers cause then the industry would need to do some serious work. As I wrote though it’s the only TC we’ve had so I can’t compare.
I did a whole lot of research including from this site. I must have missed something!
If I wanted a DIY kit I would have bought one is all I know. The place I bought it from said when we left “you’ll learn a lot about the TC as time goes”! I’ll say, I know what they meant now.