My son and I both have B&Q own brand SCMS's. The lad has the larger 210mm blade. The supplied blade was awful, but replaced with a better quality one, gives a lovely cut. His saw is carried around in his van, but, checked with a decent sqare, is still spot on at 90/45, about the only angles he uses. My own saw is the smaller 190mm, which did require a small amount of fettling, but again cuts true at 90/45 degrees. The blade for this has a 24mm bore, which only B&Q seem to do. I bought a slack handful at a clearance price-B&Q were changing the packaging. Both saws were about the £70 region when bought. Unless the cut is way out and can't be adjusted, I'd upgrade the blade and keep the saw. Cheap cordless drills though, they are just cr*p. DAMHIKT. Rick.