You know what: no offence taken at all, actually, I'm glad you asked, cause I have a valid answer. And my answer will be returning questions.
What's the challange in buying a 8043? None. How many ppl have you seen making a 42006 doing all 6 functions with only 4 motors, slim, as in almost untouched design (and batterybox not visable - on top)?
Hmmm... just realized that sounded defensive ;) Sorry.
No, but seriously. As you can see in the video, I already have the 8043, and yes, it has crossed my mind that a person not having any of em would be better off buying the 8043.
So yes, Zux said it:
And like I tried to say earlier, now that my daughters are finally old enough (8 and 5) to pick up on Technic, we try to stick to 4 motors per thing. And now that I figured out a good way to use 1 motor as an endless (as in, hold it forever, nothing breaks) switch (don't like the shifting in the 8043, since the 5 year old kind of "burns" the motor by holding the gearshifter too long), this was my first model to use it in.
If you just give it a little thought, with this shifter idea you could use 1 motor to switch inbetween.... yes, how many functions?
I know the answer....can you figure it out? ;)
1 million dollar question is: Using only 2 motors, like I did in the "turret", how many functions could you control using this technology?