It can all be explained in one proverb;
Fail to prepare
Prepare to fail.
We borrowed a friends Nacra 18 are were hoping to do a bit of sailing prior to the event but due to the weather this never materialised. So we ended up missing the start of the 1st race, capsized whilst in fifth place in the 2nd race. Went ashore and did some boat tuning instead of competing in the 3rd race and finished 15th due to traveller problems, 12th and 9th in the subsequent races.