Scottie, Hate to be gloomy, but the crosshead slots do wear out on pan headed screws, & are hard to tighten properly. A set of stainless allen heads are nice & won't wear that way. BUT there is a chance the threads into the Aluminum are wallowed loose & allowing the screws to come out. guess this should be determined before you buy new screws. I hope it's not that, a big pain to tap new threads. Perhaps a mild thread locking product would help (blue Loctite?) good luck.
Damn.Stock battery? Time to change it
Yep, officially 56 years old this year. Maybe I'll just buy some metric stainless screws and retap them.Scottie