F75 and large coil

Could you guys direct me to the threat that this issue is discussed at please

Or if it has´nt been talked about, could anyone tell me if its worth it to invest on one of the larger coils for the F75,
How about the weight? stability? depth?

Thanks a bunch to all

Nutria

Are you asking about the 15 inch coil?

If so........the 15" coil is not on the market yet.