23-06-2018, 01:43 PM
To add to Chris's comment, you don't need much dismantling to change selector springs an balls, half an hour or so once you have done the first for practice. I have dropped selector balls into the gearbox many times, but they can be recovered with a magnet on a flexible bowden type cable. Such devices are available from tool or accessory shops.
Robert Leigh
Robert Leigh