In the good ol'e days, Lancair used 4 seperate latches to lock the canopy but once locked, could not be opened from the outside.  After they came out with the forward hinge canopy, they came out with the torque tube latching system which is very easy to open from the inside and outside with just one flick of the latch.    It was easy to install and I've loved how you can adjust how tight you want your canopy latched.   There is no chance of an accidental opening in flight because it is spring locked.