How Straighten A Crooked Top Piece (video.) wyndham January 18, 2021 08:22 Updated This video will show you how to straighten a crooked top piece on a Patio Pet Door. Related articles How To Align Extension Piece Holes (video.) How do I install extension pieces? (video). Patio Pet Door Installation Video How To Split A Transfer Plate How To Fit The PPD If The Track Is Too Narrow For The Top Piece Comments 0 comments Please sign in to leave a comment.