Well, in that case, document the entire process. Show how your initial ideas of just doing things simply either worked or didn't work, and how you had to re-brainstorm later to come up with ideas that worked better/gave you more reliability and accuracy.

If it does work out, and you've still got time to spare, then great! Consider that a working prototype for your actual planned model. Build the newer version with calibrated weights, more accurate tech, etc etc.

tl;dr: Show dem bitches documentation. Bitches love documentation.