A few more comments here re the shark discussion:
Regarding the safety of kiting in the Swan River, if you look at the stats, Perth had far more shark fatalities from Bull Sharks in the Swan River than from sharks in the ocean, - that was until '98 when Ken Crew was the first of many fatal attacks. The Swan River ain't 100% safe either....google the Scotch College kid who got muched in 1929
trove.nla.gov.au/newspaper/article/45596509 ..... old story, but there's plenty more like it. Recent fisheries research shows the population of Bull Sharks (a notoriously aggressive species) is still thriving in the Swan.
Regarding the black and white stripey board / wetsuit theory.....ok, so the theory goes that the majority of slow moving things that are poisonous in the ocean advertise their poison status via the coloured stripes - think lion-fish, sea-snake etc. So, someone decided that stripes on your board will stop a great white attacking you..... However, minor fatal flaw in this theory.....have you ever scuba-dived or snorkelled and looked back up at your girlfriend and her hotty mates floating on the surface in their fluro bikinis? Do they look colourful? Nup - they're just hot looking black silhouettes. Little bit about great white biology here - smaller (<3m whites) generally feed on fish. Once big enough, (3.5 - 4m) they generally change prey and start targeting marine mammals, i.e. seals / whale calves etc. Attack strategy is strike fast from below. So, when a big-ass great white is in attack mode, charging vertically up at 40km/hr, from the deep, (i.e. seal-killing tactic, cause this is what you look like when sitting on a surfboard), you just look like a black seal-shaped silhouette too (regardless of your stripey board). Do you think that 4m shark is gonna care about a few stripes it can finally see in the last split second before it annihilates you?
Regarding sharks only attacking on dawn n dusk / overcast days - the day the guy got killed at Umbilicals was a perfect sunny, glassy day - I was surfing mid morning at 3 bears (just up the road) and thought there's no way a shark attack would happen when the vis is 20m and it's sunny, mid morning. Then the rescue helo flew over to collect his body about 10am. Same deal with the kid east of Albany, 3 years ago - mid morning, sunny day. SCUBA diver killed earlier this year off Hillarys, - midday, sunny day..... So, yep, shark camouflage (light underbelly / darker dorsal side) works better on grey days, and the stats show more attacks at dawn / dusk / overcast days, but don't be fooled by this theory either.
Have fun deciding what to do with all that info..... if you think you need a shark-shield, go for it. Shark-shield (the actual brand) to me is probably the best option - the most defendable / rigorous scientific evidence to back it up.
You're in the ocean - you roll the dice.
Agree with the other boys - best advice - don't drop ya kite!