PCB header decisions and bypass capacitors

After some useful comments on both the SparkFun forum and here, I have settled on a pair of right angle headers that look like they will do the trick. (http://www.digikey.com/product-detail/en/SBH11-PBPC-D05-RA-BK/S9177-ND/1990070) I am waiting for the manufacturer to email me the more detailed spec sheet so I know how wide the header shrouding will be.

Based on some nice comments on the Sparkfun forum (https://forum.sparkfun.com/viewtopic.php?f=20&t=35239&p=0&e=0&sid=f1d731b0e9e7087fad378aa5b65d044d), I also have added some bypass capacitors to both the 5V and 7.5V lines (recommended 100 nF for 5V and both a 100 nF and 47 uF [I chose 47 instead of 100 uF because most of the 100uF ones were not rated for more that 6V]. Also recommended was that with the two extra pins for the header I should put an extra ground and 7.5 V to reduce voltage drop. I am assuming that means I connect them to each other (the two 7.5s together and the two grounds together that is).

Pending feedback I will most likely be ready to send out for my first PCB.

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