I am afraid all I know is 1939 from Bubsy's obit. The Legion magasine article also listed his service number so I should make out o.k. for his record. I just need to contact his sister to request the record since his death was in 2004.
I've put a posting on the Army.ca forum as well with the hope that someone might recognise the names of Leonard and John so I can try for the correct group in RCOC (in Montreal I guess).
Bubsy's obit did mention his service in the Black Watch but not that he was a drummer so I hope the BW site will be able to help with verifying his participation in the band.
I'll get back to pester you with more questions when I find out some more!
All the best,
Joyce