Solid Hardwood, Engineered and Laminate Flooring - shoe molding and a floating engineered floor

i just installed a floating engineered hardwood floor over a DRIcore subfloor which sits atop concrete. I kept the baseboards in place when I installed the DRIcore and engineered hardwood and left expansion space in accordance the manufacturer's recomendations of both products. I will be using a 3/4 inch quarter round to hide the expansion space. Do i sit the quarter round on the hardwood when i nail it to the baseboard or should i leave space btw the quarter round and hardwood floor, say 3/16 of an inch? With the DRIcore subfloor, i am thinking leaving a space would be wise, if not then the whole point of using DRIcore is lost. Any thoughts?

Thanks.

Don't push it down hard, but it goes down on the floor.