isn't all that difficult?

No. It's much easier than learning the control layout for a different type of car (and unlike the car, you won't kill anybody if you make a slip-up). If you have problems switching fingering system like that, you aren't mentally capable of driving any more and should shred your licence.

Of the 19 people who contributed to this thread, only the Snail said anything accurate, and the Snail's tips were incomplete.

Mainly because he didn't address the more important issue at all - whether you should even be doing this.

It's essential to know what happens when you "jack up" the notes and when you transpose.

I can't interpret that. You just play what's written. Whatever "jacking up" is, you don't need to do it.