Sailing with only a jib
I have an Ericson 29 which I have sailed many times with only a jib in 20 knots plus. Usually I use a beat up old 100%, hanked on jib and the boat sails well both to windward and reaching. Admittedly it does not point as high with just the jib as with both jib and main. I also don't crank it all the way flat. I can get 5 to 6 knots in a 25 knot wind beating to windward at about 55 degrees off the wind. Advantages of using just the jib are the boat does not heel as much, no rounding up during gusts, less fighting the wheel, only one sail to take down, etc. Some people have told me that using only the jib stresses the rig. As an engineer I can not see how having less sail up causes more stress, but then I have not done a finite element analysis of both cases.
Try it on your boat.