you might try using a different brand of blade i have 2 deltas a16 in & 20in . i only use flying Dutchman blades .one more thing you can check is the tension if it's too louse it may wander good luck Ron
hi Marg when i'm looking at cheap ply. i go by the glue if its exterior grade then i'll then look at the edges for voids if both are alright then ill buy it.
have had good luck using this both with boat building and scroll sawing good luck Ron