Pearls of wisdom or the voice of experience or been there had that happen, your choice. Last year I ended up with a giant scale plane in a trade, servos were still in it. I tried to remove them. Had to grind off the heads, remove the servos and use vice grips to remove the screws. No way would they come out with a screw driver. They had them CAed in. I have been known to rush my work and installed the servos before the glue had cured 100%. I use hex head screws and even then they were a real thrill to remove!! Not the first time I had done that!! Probably not the last either!![&o]