I scaled it using the Airfix kit parts used on the launch trolley so it's just under two feet long. The main body is a piece of lathed turned meranti hardwood, with balsa shield fins. The rear thrusters, wing blisters and fairings are sanded ramin hardwood. The tail fin and wings are plastic card of varying thickness. The canopy and secondary control room blister were vac formed using clear acrylic sheet.
Over the years its had a few knocks, mainly from when it went on display, along with my scratch built Anastasia model for a travelling 1990 Dan Dare exhibition starting in my home town of Southport..
Here's some photos showing the comparison between the two sizes of Fireball Junior. Both of these attach to their respective main bodies using a plastic rod. Not very sophisticated but it works.