I bought 3 of the maintenance free versions from New Castle in 04. They don't stay in my cars other than for shows!!! Had one in the 68 BB car this past winter and it leaked and did many 1000's of damage..$$$$..!!! When I notified them of the problem they blew me off!!! Thankfully Hagerty stepped up and paid for the repairs. My suggestion is to buy an AC Delco professional top post battery and put one of those plastic covers on it. If you have to show a car with the correct battery then only keep it in for the judging and then switch it! Funny thing is they had one hanging upside down on display at spring Carlisle in 04 playing a radio!! They claimed this new unit wouldn't leak....Yeh, and the check is in the mail!
wilma