Need help with Sony flashes

I have the 42 flash and just purchased the 20AM with connection adapter for my NEX-6: Everything works great!

The 20 is a fine portable flash, will be enough for most situations... can easily bounce from ceiling, light and portable It can control the 42 flash very well, I like it!

The Bad: Adapter to use the 20 on the new Sony ISO-shoe is about 35 bucks, and it adds about 2 cm... Second, you can't left it on the flash for transport because it is only off with end folded (no dedicated on/off switch) so I hope I will not loose it while traveling...

The Good: I can use the 20 flash without adapter on my a77