Hey oldelkhunter i looked at one the other day and was told they redesigned the back bar . it now looks like the old bar.
anyway the guy said he changed his to the new bar and noticed it grips great. he( the salesman) did say the old well new style did slip and that this was supposed to stop that.
i got to say i love the way they feel when sitting in one. i think i could stay in one all day.