ASW yes we used them for quite some time and using 18/24 had no issues.
On gear strippage. you must use the short engine screws to the engine mount at the rear. If you use any longer than the stock ones the screws that mount the engine mount to the chassis and the engine come together as they share a common hole. If you use the engine mount screw that is the next common lenght longer at the rear of the engine the screws bind together leaving about a .010 gap between the chassis and the engine mount screws. It is invisile to the eye but the mount is not secure to the chassis. The engine will shift every time stripping the gear.