I did not read all these posts but would those suction cup handles be any good? I have been thinking of getting some.

i find it only helps to pick up the ruler, not to keep it from slipping.

do the olfa blades fit the martelli rotary cutter?

Invisgrip works great. It really helped me a lot. I now use it on the back of all of my rulers. I also got one of those suction cup handles to put on my ruler which also seemed to improve things a lot. Are you "walking your hand " up the length of the ruler as you cut? That, too, seemed to help me a lot. I had exactly the same problem you are having. Believer me, all of a sudden one day you will have just practiced often enough and it will happen. In the meantime, cut slowly!!

They fit but don't use them. The Martelli blades have a round hole in them, the Olfa blades have little notches around the hole. Those notches will cut through the screw that holds the blade in place. Which is not a good thing at all..... you then have to replace the screw. (Yes, I am speaking from experience here.....)
Love my Martelli cutters, and the blades seem to last a bit longer than the Olfa ones. At least for me.

Have fun,
Pati, in Phx

I recently splurged and bought a gadget called "The Original Gypsy Gripper". It is one of my pricier gadgets for quilting but I wish I had it long ago because it really holds my rulers firmly in place with NO slipping. Here is the web site -- I didn't understand about clicking the browser button. Guess I have to learn the computer as well as the quilting! Hope this explains what it is. Just copy and paste into the thing (you know what that is!)

thegypsyquilter.com

Wait! Don't give up. Those little round sandpaper things are great! They worked for me. Also, watch how you hold your rotary cutter. I keep my index finger on the top of my cutter--that seems to work for me. Good luck and don't give up.. Just walk away from it for a few minutes but don't let it get the best ofyou. YOU can do this!

I wrote about the Gypsy Gripper which keeps the ruler from moving but it raises your hand so that the blade can't reach your fingers and cut you.

I consficated a magnesium "mag" concrete float from my husband and use it to hold the ruler in place instead of trying to hold it by hand. A mag float is the thingee used to smooth and level concrete once it is poured. It is light weight and rectangular shaped with a large handle. It takes less pressure and works better for me.

Oh Yea! I know what that is and would work great. Great Idea!