I really hope I can get the furler to work easily. Right now it is difficult to furl and unfurl the main. I think I need to adjust the tension then it should work with less effort.
7 out of ten times there is a problem with IMF it is operator error. There is a learning curve to getting it right. The other 3 times it is because the sail is baggy or has a big belly. We sailed 3 years with a sail that was deteriorating and we still had no real problems getting it in or out. Just take it very slowly, out a bit, a watch that nothing is binding. If it does, stop immediately (you are not going to succeed if you try to force things) and go the other way a bit till things free up, then continue.
Don't waste a lot of money on riggers and sailmakers before you've really become familiar enough with your system to know where or what your problem is. Worst case scenario, take the sail to a sailmaker for an opinion whether the sail is in good condition, if you can't tell.