Ok guys first I would like to say this is a amazing amp ,i did a gig tonight using it and I had the volume at only 4 and it was stupid loud ..it had my insides vibrating ......anyways here's my problem ,i bought the amp used for 100$ and I already painted it black so now it looks almost new now I noticed that all the screws on the top that holds the cover on the amp are all stripped ,so if I try to tighten them they won't tighten at all and I already lost a few of them, should I add some glue to keep the top cover down or what's a good cheap option? Thanks in advance