Join Date: Jul 2013
Location: Gatton, Queensland, Australia
You could leave it as is. It takes many drops of oil to fill a thimble.
Alternatively, use WD40 and a rag to clean the area and lie on the deck to watch the plug and see exactly where the leak is. Your engineer had a good idea in fitting the 90 degree fitting to avoid the need to reseal the plug every time you did an oil change.
Perhaps he might have another go if you could positively identify where the leak is.
Best done when the oil is hot and therefore flows easier.
2010 Weestrom; 2017 Kawasaki Versys-X300; 1988 Suzuki GSXR1100