Loosing the canopy was reported on here as early as the first quarter of last year, lots of people have not had the problem, it seems the quality of the magnets or the tollerance between one airframe and another can make a lot of difference to the way the canopy holds on, the simplist mod I found was a catch at the top of the canopy frame bent over at right angles to form a handle to grab hold of and enable removal of the canopy without putting your fingernails under the very thin bottom of the canopy, most Angles I see have damage to the rear edge because of this.

Mike