I found a 931 for sale locally on Craigslist. The seller says the only thing wrong with it is that the "tape door will not stay shut." Anyone run across this problem before? Is it common on the 931? Simple fix or replace the entire door? I'm going to take a look at it this afternoon so I'll know more then. I really don't want to get one that needs a lot of work as I have too many projects now as it is.