When I teach this I DONT use the method of put this bit here and then move it to there, if you do this you have to learn lots of different sequences for each different problem. If you remember where each item goes and put in what you have you can then set the confuser up to find the bits you want.
ie:
if you have the wind, it goes down from the wind direction. If you don't, set the rest up, draw in the wind X and then set the X below the center to read it.
TAS goes under the center circle
Heading goes at the TOP (easy to remember - it SAYS heading there) with the track offset under the drift on the same side and amount as the drift under the wind X
G/S is under the wind X when the computer is set up.
I hear cries of "but I don't HAVE the heading/groundspeed/drift",
this is when you set up an approximation and adjust the computer until all matches as above (usual approx is to start off putting your track at the top then adjusting to match the drift). If you follow this, it becomes easy even for obscure problems such as having all but heading and TAS!