RE: Anyone own a Ofna Ultra LX1??
Stock Ofna (HONG NOR) engine mount screws are VERY TIGHT and have A LOT of thread lock applied. If you need to, cut a slot in them and remove em with a flatblade screwdriver. I always have a spare set on hand.
Once you have them out, regular threadlock applied normally will be perfect. I've never had the same problems removing the screws from my Jammin or my son's LX AFTER getting the screws removed the 1st time.
Never run with out without threadlock on these screws because they can shift under load and vibration.