Jigsaws make rather poor cuts (can use router afterwards but that's significantly more involved than a circular saw). Personally, I'd not use the jigsaw for pie

Jigsaws make rather poor cuts (can use router afterwards but that's significantly more involved than a circular saw). Personally, I'd not use the jigsaw for pieces I'd hang on the wall, esp. not use jigsaw free hand. On hardboard - no direct experience with, yet I'd expect it doesn't like moisture, so it has to be properly sealed.