What was the hardest part of this task? Easiest?

One of the Approaches to Learning (ATL) suggested for Science in the MYP is stated below:

Social skills–Practise giving feedback on the design of experimental methods

Discuss the statement above as you reflect on your planning and building of your instrument.

How successful was your instrument in the 5 tests? Which test(s), if any, did your instrument fail? Be honest! Discuss your ideas on how to improve your instrument.

Discuss why you built the instrument you did? Do you play a similar instrument? Was it an instrument you thought would be easy to be successful building, intrigued or challenged you?