Thanks for the welcome gents.
I'll get some photos this week, and share them on here. In term of the radio gear etc, I'm considering replacing it all for a newer 2.4GHz system, it currently doesn't have a speed controller, but a servo, that actuates an arm which triggers a small switch, so it goes from zero to 100% throttle in a click.
I think it's due a full refit, so new motor, esc, radio gear, servos, probably a new prop and shaft too
Thanks for the link too, I'll have a good read now
Thanks
Chris