If it is in your budget, I highly recommend an accuquilt cutter. They have a range of cutters. The dies are amazing. I have finished 2 quilts since getting mine and have not had to square them. They come out beautiful. My other 2 favorite tools are Tailor Shape Cut ruler & a long tweezers (from my serger to help guide curved pieces). Go to accuquilt .com and check out their sales and I have had good luck picking up some dies at amazon. It really is my favorite quilting investment. I should go to work for them as I am always singing their praises since getting mine for Christmas.