What I advocate is I get the first unit to test for a short time; but as for long term testing unless you guys want to wait a few years...... What is nice about this company is they specialize in tensioners and any issues initially should be limited to fitment and proper tension which would be addressed by the prototype install.Woww sweet. Im interested. Will the r&d be done.or are we the guinea pigs? Thx for your intrest in.providing hard to.replace parts. X2 on.kirban..