Odyssey PC545 dry cell racing battery, in the boot with it's own fuse.

Decent cable (fused) goes from the positive on standard battery underbonnet to the bass enclosure amplifier, then onto the Odyssey (also fused).

Amplifier is earthed to both Odyssey and floorpan (used the spare wheel securing bracket).

Both batteries work together and the rear charges whilst driving.

The answer is yes

E-Bay specials;

Ford/Kit car battery tray and clamp

Quick release Battery Terminals.

Hardest part getting the new terminals on. Ended up cutting off the Jap Terminals and re-wiring to the new ones.

Best Bit;

Can go with a bigger Battery (Now a 53amp)

Worst Bit;

Covered the tacky bit of plastic chrome with some 3M carbon film.

360 degree LED number plate bulbs, normal LED bulbs wont light up entire number plate length, these ones work well.