I have been thinking about picking up a Klarus MI10. I notice it looks very similar to the 4Sevens Preon Revo. Are these both made by the same company? (I heard until recently Klarus manufactured lights to be sold by other makers) And, if so, has anyone had problems with the rear contact spring on the MI10, the way there have been issues with the Preon Revo? I also have Revo and luckily have not had any issues with it.