blee1996
Subscriber
The 283/285 (and similar) flashes are large -- but powerful. That's why I asked if the OP wants ONE flash to use on ALL four cameras -- and how much power! While a 283 is big for a Trip 35, there are a ton of great small flashes with 283-type features that are much smaller and lighter (only 2 AA batteries) that have auto and manual modes and cost less than $10 used. The SUNPAK Auto 101 comes to mind as does the Minolta Auto 118X. The SUNPAK Auto 121 S is incredibly small.
Here are just Minolta's flashes:
http://www.subclub.org/minman/flashes.htm
Your opinion of "instead of buying Foo new, you can buy 10 Baa used" is well known.

We will let OP decide based on his/her needs and preferences.