Off camera mounts - what are safe for 360FGZ??

Lucky me, I now have two 360FGZs - but one has been in for repair and I do not want that to happen again.

So, for the slave flash in a two flash wireless combo, I have at the moment one way of mounting it ie on a shoe mount which I can screw onto a standard tripod head. There is no hot shoe contact but the plate of the mount is metal.

This works well with my other Pentax flash guns - eg AF400FTZ, AF330FTZ but I am nervous about using it with the 360FGZ.

Any suggestions or experiences on how to mount off camera very welcome.

Thanks

Scott