To address some concerns about compatibility with the Laguna 14-12 band saw, this Timber Wolf 115" band saw blade is the right size. The fit issue is likely due to the top wheel not retracting. all the way down After releasing the tension with the side grip, the wheel should fall. In certain weather conditions (unconditioned storage) my impeller gets stuck even without tension and prevents it from falling down 100% to mount the new blade. After making sure the tension is released, quickly press down on the wheel to make it drop. That should help: you can now look at the blade above the top and bottom wheels. There are two 17mm nuts and bolts. behind the top wheel, holding the slide mechanism by the spring. After releasing the blade tension, loosen each of them about a half turn so that the top wheel falls freely.