Thanks for the input guys.

As Gray Beard mentioned I reckon it's going to be dependant on the engine. It doesn't seem that far back to me, it's not even right over the CG. So I think I'll try it as is and see how she goes. I'll just be carefull for the first few flights and make sure i'm in gilde range of the field to deadstick if needed - which is a good idea anyway!

If it gets lean I'll buy a perry pump. I reckon a more consistent CG is more important than a simple setup. Pretty sure most pattern guys wouldn't mount their tanks up front!

Thanks for feedback on CG calcs too, makes sense!