This is my current circular saw. I add a straight edge as a guide and I need to offset it 30 mm, to get exact cutting distance. Of course I can use this only to rip bigger boards that I can put on trestles, not some 200-300 mm boards. This will be ripped with a hand saw.Had you considered a track saw? It seems a good compromise? Use outside on trestles, far straighter than circular saw? Packs away smaller than any fixed saw?