Folks,
Nothing new under the sun!!
Many moons ago, I worked for a UK mob, who had about 30:40:30 permanent staff:contractors (me): casuals ----- this included Captains, F/Os and E/O, the fleet was a mixture of B707, both JT-4 straight pipe, and various JT3B variants.
Only two out of eight had a common cockpit, which made it a trifle interesting at times, at least at OneStar it is going to be one type.
Maybe you could even get the FOIs and "sick" pilots from other airlines moonlighting, as we used to in UK.
Tootle pip!!