@industrialcomfort shows you how to make a router sled with dust collection to flatten your wood slabs and boards! This flattening jig is a great DIY woodworking project that will save you big money and costs less than $200.
Parts list:
16x2000mm linear side rails: https://www.amazon.com/dp/B08BFXNTDY?ref=ppx_yo2ov_dt_b_fed_asin_title
20x1200mm linear cross rails: https://www.amazon.com/dp/B082D9BHVN?ref=ppx_yo2ov_dt_b_fed_asin_title
M6 machine screws: https://www.amazon.com/dp/B0892C837G?ref=ppx_yo2ov_dt_b_product_details&th=1
1/4-20 flat head bolts to mount cross rails adapters: https://www.amazon.com/dp/B0BWCVHC7T?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
1/4-20 acorn nuts: https://www.amazon.com/dp/B0BRX5LQWY?ref=ppx_yo2ov_dt_b_fed_asin_title
dust collector flange: https://www.amazon.com/dp/B091XT71VF?ref=ppx_yo2ov_dt_b_fed_asin_title
12x24" acrylic sheet: https://www.amazon.com/dp/B01FECQNWW?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
3" brush seals: https://www.amazon.com/dp/B0CHXZR5NV?ref=ppx_yo2ov_dt_b_fed_asin_title
linear rail collar set: https://www.amazon.com/dp/B0BWK81DR9?ref=ppx_yo2ov_dt_b_fed_asin_title