The year Kelty departed the SFJA top table sneered at them at the SJFA AGM for doing so. Heard that from multiple sources.
CLubs were told that should they leave for the LL but choose to come back, they'd start at the bottom, i.e. a 4 division demotion for the likes of Pollok. We were interested but fear and tradition was used to stop dissention.
TLDR: Tom Johnston is the answer to all your questions.
It will take another 20 years to undo this 5 years of messing about as the waves lapped Tom Canute's feet.