I have two 46 LAs that have never had any problems of any kind. I use them for fun fly planes and any of my small planes. I no longer fly any new 40 size planes but have used A couple of the Tigers and the OS 46Sfs. I wouldn't ever own another Tiger of any size, {{Junk}} JMO!!! It's true the bearing engines have more power and will outlast the LAs but the LAs are so user friendly. Been flying with my two for five years and they get A lot of air time.
I have different engines for each plane but when I get tired of A plane and build A new one then the old beast gets retired and the engine and gear get moved to something different.
Only thing I do to new LAs is to remove all the screws one at A time and lock- tite them. I have set up planes for other people using the LAs and to date unless I tightened up the screws they would come loose.