One of the issues reported about the Parallel Guides from Festool has been the weight imbalance. One thing that Festool didn't do initially was point out that the extensions help to balance out the weight. I leave mine attached most of the time.
What I think is more important in your situation is the overall width of the workpiece being cut down into those strips. If you are cutting 2" strips off the end of a full sheet or plywood then they work great. If you are cutting a 2 inch wide strip out of 3.5 inch wide bored then frustration is inevitable UNLESS you have scrap material the same thickness as your workpiece AND your worktable supporting all this is big enough to support everything and make you comfortable.
Peter