Shermaniac, thank you for your input!
1. I will certainly look into a replacement gun barrel. Kit inaccuracies aside, I'm not happy with the way I've repaired it, anyway.
2. The tracks aren't fantastic, I'll try adding some weights as you have suggested, is it possible to get the Dragon Magic Tracks or equivalent to fit? They look much better!
3. Great, thanks, I'll set about correcting this as soon as possible!
I am not sure if there are any clubs nearby, but I'd certainly consider joining one if there was! I'm still very much new to this and I'm learning something different from this forum and other sites every single day.
Thanks again,
Steve.