Leisure Battery and Wiring

I had a leisure battery from my old transit so I used that and fixed it to the floor with an old battery tray that I found at a scrapyard. I'm still not totally happy with the charging setup for it because a fuse seems to blow a bit too often for my liking. I haven't got that many items running off it though - a small water pump, the heater fan, a couple of small lights, and now and then I hook up a transformer to it so that I can charge my laptop.

The wiring is pretty basic but seems to work - I just have a small fuse box with 3 different circuits (overkill probably).