Yes, a laser tool would be the right solution to align your belt and belt drive perfectly. Maybe you can try this belt alignment tool out: LAT1 Bestorq Laser Alignment Tool from Biemko.
Get a laser alignment tool to solve this alignment issues. You can purchase at Biemko. It is called a LAT1 laser alignment tool. The laser visibly shows a calibrated line that effectively aims at the precise targets for a perfect alignment.