Screamer timing chain idler bracket

I have had three idler brackets for the timing chain bend
since I've owned my Screamer. The first bent (excuse the
pun) after about four years, second lasted two years and the
third lasted under 100 miles. Maybe we're just getting
stronger...just kidding. The original had a single roller.
It was replaced by an upgraded double roller. The current
one was installed using the modification instructions on
RANS site using a single roller for the timing chain. RANS
is sending me a replacement at no cost, but seemed puzzled
as to why it bent. They are also sending a return envelope
for the bent bracket. Any suggestions on how I can eliminate
this problem?