Thanks for the advice.
Righto, this is how it's going...
I've built my cabinet and got the tank on it.
I've put my egg crate on the bottom and silconed in my background.
I've also built an undergravel jet thingy me bob with a powerhead and pvc pipe and directed them around the rocks.
I've powered washed my rocks and put them in. More or less happy with it, just the top one might need changing.
I've modifed my hood and hood filter to let the big external pipes in from my external filter (which is ready to go).
Air stones are in position.
Scratched the front of the tankw ith my belt....grrrrrrrr.
.................
Still got to:
1. Wash my pebbles and plonk em in.
2. Wash my sand and plonk it in.
3. Insall my 'Blue Lagoon' LED light.
4. Fill it with water.
5. Cycle it.
6. Add fish.