Most tweak shaft Pumps have similar failures, I had close to 10 11.2 (Blow up) last year I clovered them all except 1 , I had another fail this year I'm covering that also.
The replacement's have been holding up well. After 100hrs of what causes these random failure we now are machining our own component's, Just to tell you how random these failure are (Besides the ones you know what caused there failure) I made 2 11.2 wild pumps (Sisters) for comp use back in FEB 16 1 is performing well (Has several Passes and dyno runs) the other blew up within Minutes after installing.
I rigorously test these pumps, Even I have trouble finding the cause BC in most cases its nothing but carnage. The last one I was able to get all the parts (100% thanks to the owner in not operating after it blew up) and glued it back together I found the cause that has been evading many of us for years, the fix is in and I hope this is behind us, Our 10m have been almost trouble free, its the 11.2 I had trouble with, But I suppose if I wanted to mislead owners I could call it 12.4+ if I measure differently.