You should be able to up the force to 8-8.5, speed 5 and it should cut just fine with the standard 45° blade. Or do what I do, set the force to 7.5 and run 2 passes. And always do a test cut on a small star or square before trying to do a whole big design when working with new materials.
And if you want a 60° deep cut blade, here’s a link to a set with 30°, 45°, & 60° blades. The 60° deep cut is not the same as the 60° deep point blade, as explained in my post - 10+ Advanced Things to Know When Starting with the Loklik Cutting Machine 2