Just guessing, but I bet you would have held the plane on course much better if you had both hands on the controls and your head up as opposed to fiddling with a whiz wheel in your lap that gives you a relatively useless wind drift correction. How much correction do you need? 7 degrees? No. You need whatever it takes to hold the plane on course; much simpler that way. Whatever, it's part of the hazing I guess.
You remember the sims in Primary...
Bogey, whizzing his wheel and attempting to get sim #13 to keep from entering OCF:
Bogey: "Uh....sir, I'm estimating the TAS at... uh... 193 knots"
*aircraft banks 60 degrees and dives*
Bitter old man pulls mic away from his face
Horseman (to himself): "WTF are you doing in there??"
Horseman ATC: "Navy 7G735, say altitude!"
Bogey: "Fvck!"

Bottom line from this dialogue is learn how to use it, but in the real world, you probably won't be busting hand calculations, nor will you be spinning the whiz wheel in the cockpit. I don't think it's cheating. You were supposed to have a calculator, right? You know how to do the math right? Then what's to say you could write the program YOURSELF?? You're fine.