E system anyone used two 1.4tcs and 150mm F2 lens?

The 150F2 lens performs very well with a single 1.4tc with minimal quality

loss, but there is a big gap in the E system with no dedicated 2x converter to

get to occasional 300mm lens (600mm equivelent in 35mm terms) usage.

Has anyone daisy chained two 1.4 tcs to get to the rough equivelent of a 2x tc,

and is the loss in resolution acceptable or horrible? - inevitably there will

be a loss in resolution in any system using mutiple tcs, but is this

combination producing acceptable results.

The 1.4 tc has a chip reporting its presence, does daisy chaining result in

loss of AF - ie automatic shut down in same way as using 1.4 tc and extension

tube together? A 2 stop in light reduction should still give F4 and full AF

capability in normal terms.

Mike