I was worried, about a year ago, as the master wasn't coming near me for many months, I decided to Ivanise my bike with a s/o kit. All went well, except that I lost a needle spring from one of the carbs. (A very small spring like half a cigarette lighter spring.) I cleared my bench off, and cleared and swept half the garage out with no luck. A replacement cost me about £35 and had to include a needle kit. I finished the job, and found the original spring about four weeks ago trodden into the coconut mat in front of my bench, undamaged!