About a year ago I bought a cheap jigsaw from Aldi, and it came with a pack= et of blades, which I thought was good. Well, after many frustrating attemp= ts at getting the saw to work well - the blade would bend off to the left s= o cuts were not perpendicular, the saw would wander with anything other tha= n the lightest of touch even when using a guide, etc, - I resigned myself t= o the idea that it wasn't such a great purchase after all.
But yesterday whilst in the local Axminster I bought a 5-pack of Makita B-1=
1 blades for four pounds twenty. Well the difference is almost unbelievable= . The saw now cuts straight, perpendicular, and a lot faster. Clearly the b= lades supplied with the saw were garbage.
I hope this helps anyone in a similar situation.