Unit is fine very well put together
I bought this to hold my battery in place, well to small for my battery, I have a costco battery same width, but to small with length, I need to magiver my unit to hold my battery .
Hi Sheldon. Looks like a case of trying to fit a round peg in a square hole! The Optima Battery Box is designed to fit D34/78 series Optima Batteries...we even include a dimensioned print within the images for reference. Unfortunately it didn't fit your Costco battery. Thanks!