If anyone is having trouble seeing their OAX in MEW, follow the steps below
Would be good to place the Contract Address and all the info for adding Custom Token separately somewhere on the site.
It's missed in the How-to-Contribute Guidebook for Users:
"Step 6: View your OAX Contribution
To view your OAX contribution and balance, add OAX as a custom token in your wallet by
placing the smart contract address (

) in the Address field, the OAX Token Symbol (OAX) in the
Token Symbol field and 18 in the Decimals field before clicking Save. Your OAX balance
is viewable in the Wallet Info section of your wallet."