I made my own aluminum pressed in pills 8mm thick for the 10-12 Courui’s I have built for people/myself and raised the shelf 1.5mm and it was more than enough. With a 32mm pocket for the 32mm Noctigon XP board it pretty much covers the (thrower) emitters to be used.
Now if the GT is designed/engineered and manufactured correctly around the target LED do you really need that much adjustment? If you need more press wouldn’t a stripped down mcpcb board suffice for your other mods you might want to do?