Can you tell us how it is with Liam? What blade (still ZQH) and rubbers does he use? Will JOOLA make him a special blade with his name on it?
Do you at least choose rubbers with a specific hardness or weight for him? And a blade with a specific weight or thickness?
G1 is an older rubber concept with a thicker topsheet and softer sponge, while Hammond is a newer rubber with a thinner topsheet and stiffer sponge. Therefore, G-1 lasts longer and signs of play damage will show on the topsheet later.
Butterfly Primorac off- and Korbel made in Hungary are very vibrating. Japanese ones vibrate less, at least that was the case before. I don't know today.
I played with your FZD ALC blade, and it does have a small vibration, which is desirable. But these blades vibrate really hard, and this characteristic is distracting and has little to do with feel.
The biggest problem with current ALL- to ALL+ blades is that they are too thin and therefore vibrate a lot during play. Can you choose of these blades that will have a lower speed but will still be stiff enough?
According to Butterfly logic, the numerical designation 09c for both rubbers should correspond to the same topsheet.
And as mentioned, a softer sponge that activates better at lower power.
I recommend my players to use Frienship 729 FX soft rubbers for their first bat, or the aforementioned Mercury soft on both sides. They are sufficiently rotating, but slower rubbers that will force them to develop the correct hand movement habit while playing. I do not recommend tensor rubbers...
As mentioned, Glayzer 09C has the same topsheet the same as Dignics 09C. Is this statement true? Do you feel like that? Or does it have another with smaller spin potential?