The stick is a very old design but there is a reason they are still so popular. They are a perfect flying machine. I'm a big fan of the 60 size planes but I have flown some very small and some very big sticks. All sizes flew great. The OS .91 is also my engine of choice. To date I haven't gotten to do any real testing of the newer .95 but I have never met an OS four stroke I didn't like. I did use the SK .91 two stroke on one I assembled for a friend and that was also a great combo and at $100.00 with a muffler it's a great deal. My first choice is still the OS though. No one can ever go wrong with a stick!!
