I have a new stock and was tempted to fit it the day before competing at the sussex interclub but have bottled it through fear of shooting badly
( no jokes please sussex shooters , look at the percentages . lol )
I recall at one shoot at Ford I was still fitting new mounts on my rifle with 15 mins to go before the whistle
... shot quite well IIRC
What last minute changes have you ever made to your hft set up and did it work or not ???