Currently I have 5 Catalyst 3750 V2-48TS as slaves and 1 Catalyst 3750g 24TS-1U as the Stack Master.
I was wondering if there was any way to change the Stack master to one of the slaves without devices plugged into the ports on the master loosing connection. Since these devices cant lose connection the master cannot reboot to cause a new master election. I've looked at the documentation for the Catalyst 3750's Switch Stacking features (https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/71925-cat3750-create-switch-stks.html) but there seems to be no way to change the master without rebooting the Catalyst 3750g 24TS-1U.
This is the output to show platform switch all (due to internal policies i had to censor the MAC addresses): https://pastebin.com/6PVpHjns
(config)# switch 1 priority 0and then give one of the others the priority of master
switch 3 priority 15. The users will still be disconnected when the switch is shutdown, but switch 3 will take the master role and run the others.