[iminhell1]

I'm another vote for Schwaben.

I flush my fluids yearly (Brake, Trans, Diff) and it's worked perfectly.
The only problem I've come across is the gasket on the orange pressure release cap will not seat correct sometimes, bleeding pressure. Easy enough to hear the hissing. Just remove and reseat in the cap and it's fine.

I've had no issues running multiple different fluids through the same machine. You just want to clean it well and never leave any fluid sitting in it. Should always be stored dry if multi use.