Off-brand flashes on Nikon cameras?

I bought a Wein Safe Sync http://www.bhphotovideo.com/c/product/245292-REG/Wein_990_560_Safe_Sync_Hot_Shoe_to.html that reduces the trigger voltage of any flash to below 6Volts I can use my Metz 60 CT1 whose trigger voltage is over200, and my Elinchrom studio flashes with my Canon T90 without frying the electronics.

From the botzilla list there are quite a few at 200V+, some at 270V.

Older Nikon AF flashes like the SB24/25/26/28 are very affordable now--no worries about incinerating your camera's electronics, either.