Steel channel to prevent cupping
Looking for your thoughts here. Im getting ready for a lived edge kitchen table build consisting of 3 boards edge joined spanning approx 40in. I have seen an a few instagram feeds that companies are using steel channel routed under the slab to prevent cupping obviously with elongated screw holes to allow movement. I like the idea if i can prevent any cupping im ok with doing it however i cannot easily find the channel short of paying a crazy price from a few specific companies. Is it worth the investment or if dried, glue up and finished properly is it overkill? If you think its worth the effort any source of the channel online?