It is always easier to go to what you know, but there was a time when you didn't know MTC.
I try to spend time learning a new software, when I don't have a project that needs to be done yesterday, and have some time to play around. Once I get comfortable with the new software, then I can choose which one I want to use, based on which one does what task better or easier. I think MTC is better for designing sometimes, because I'm more used to it. And it has a few things that SCAL does not. I also have been trying to learn Inkscape, and to me, it is easier to do things in there, than either MTC or SCAL, but when I was trying to learn it, it took forever to figure something out. So it is just what you are used to, and what you want to use.
Personally, I like having more than one software to use, so I can choose which ever one I want at any given time and which ever one does something the best.
Are you setting your blade holder with the setting tool that came with your SB?? You shouldn't need to use tape if you are using that, and have the blade set in the holder properly. (The tool is a piece of metal with a piece of white board on it, it is the correct height to set your holder in the machine and it makes a HUGE difference).