I am curious as to the 'why' of your cutting problems.
I now like the sandpaper dots on the back of my rulers. I used to use Invisigrip. My hands have difficulty holding the ruler straight. For more 'normal' quilters a tip is to keep your little finger on the far side of the ruler and on the fabric, so the ruler is against that finger while you cut on the opposite side of the ruler.
I do use my Alto's QuiltCut2 for doing strip cutting.
A friend just showed me her new cutting guide. Check out:
www.quiltersslide.com You only need to put pressure on one point and the cutting guide stays put. It is kinda neat. Comes in 2 sizes and either clear or yellow [I prefer the yellow.] However if you have arthritis in your wrists this may not be for you.