dfk41
No arguments from me. If I had a Duo (as I still do) and was not going to migrate to 80mm (or larger for those who require very large burrs) I would do what I did – keep my Duo and add 83mm burrs that performed as needed. Much cheaper than taking the loss on a Duo plus purchasing something new (and personally unknown)
The Casa seems a very nice grinder for its’ price; it is however expressly marketed for light duty. 90 second bursts maximum then a rest period. This would probably not work for me.
Re: 64, 65, 83, 80 – each has a role to play – and 75 too as in your Mythos ;-)