Yes, you can add more than one reward in simple way. You must add new reward to your original EXISTING reward that you pledged for. You can add as many of them as you like to your current pledge. To add an add-on, simply include the amount in the pledge.
Example: If you made a $99 ($84+$15 shipping) Super Early Bird pledge (Phonster Z Full) and you want to add the one more Phonster Z Double, simply, add $84 ($75+$12 shipping)(Super Early bird) to your pledge and enter "$183" without changing the reward category.
After it, please inform us via private message, and after campaign ends, in the survey you will write your both rewards.
Yes, you can.
To add extra part, please add to your existing pledge $5(SportFix strap), $10(Belt Z), $13(Mini Wallet Z), $26(Wallet Z), $30(Backstraps), $35(Pouches Size M/L/Multisize).
After it, please inform us via private message.
Don't see the answer to your question? Ask the project creator directly.