If it was ME, I'd inlet to full clearance with combo X-Acto obby nife, Dremel with a small, fine wood burr, and inletting chisel. You could get by with good strong SHARP knife and/or dremel, and/or regular wood chisel. It don't look like there's much requiring removal so it shouldn't take you about 1/3,000th the time to do it as compared to sending it back & shipping cost.