Took me a long time to get mine fully square - but I eventually bought this set for true miter cuts - it is brilliant
https://miterset.myshopify.com/
Good luck
Graham Wilson
USAT Level III Elite Coach
http://www.thewilsongroup.biz
https://miterset.myshopify.com/
Good luck
Graham Wilson
USAT Level III Elite Coach
http://www.thewilsongroup.biz