No problem, its easy to become focused on your own little world and to forget we are all quite different in experience, knowledge and abilities,
too much focus on track riding IMO, some seem to think its the ultimate and what works on a track is the dogs danglies, wrong
fast road riding, Road racing as in the IOM TT / NW200 etc,Endurance racing, drag racing, hill climbing demand a different thinking regarding bike set up and components,
The ultimate test of man and machine has to be the IOM TT, no question
Getting back to chains, if you look into it not all chains are created equal, its a sweeping statement to say a 520 chain is x pounds lighter than a 525
and not true, the same as saying a 520 is as strong as a 525, again wrong
take a look at just one chain manufacturers product/ spec list you will see what I am getting at, you can actually stick with a 525 chain, keep the strength, and save weight
http://www.didchain.com/chainSpecs.html