Hi, We're putting in an ipa deck next month and I have a few questions I hope someone out there will have the answers to. 1) hidden deck screws, which is best the "claw" or the "bisket" version? 2) does the ipa need to acclimate to our enviroment? 3) do you have to seal ipa with a water repellent? Any advice would be most appreciated. Thanks normwantabe