Don't stress mate. When we get a chance, bring the board over and I will replace the header pins as well as reflow anything that looks a bit sus. Someone may be able to let you know what type of trim pot (volume) to get. You will be able to get them from jaycar hopefully and I will change it as well.
See if you can identify what caps are on the board as well and let me know. I have a fair few different ones here and anything I don't have you can most likely get from jaycar as well.
Only other thing really then would be replacing the connector pins.
Thanks Blair. Anybody know which type of trim pot to get?