You can easily hear or find with soapy water a boost leak when pressure testing.
It's easy to make an adaptor for a compressor. I don't know anyone with a smoke machine.
Good price.
Drilling not required. I have some new inserts that are m12 as per some Nissan models, eg s2 rs stagea. You knock out the m14 inserts and tap in the m12 inserts.
Very nice. If peeps are interested in that pm me. I'm here to help
http://www.mscn.com.au/speedflow-products/hardline-fittings/compression-adaptors/speedflow-618-series-male-tube-adaptor
Compression fitting like that. Not necessarily that exact one.