This enclosure has changed 3 times. Originally was made for a single L7 15 after a few months it was modified to hold two L7's. This time I was asked to change the square L7's to two round 15's. Because of clearance issues laying another .75" top on the existing baffle was not an option. I started by plugin the holes filling the gaps with a sandable resin. After the base top was smooth I re-skinned the top with a .25 mdf bring the the baffle to 1 inch overall. Centered the new cutout's and recut using my circle jig.