There will always going to be a slight lag. Depending on your definition of lag and what type of lag you are experiencing.
In my experience, the Crystalsky tablet is under powered, the processor cannot keep up with the demand and it heats up and crashes. To help eliminate the crashing, lag, heat, etc,.... you have to optimize the CS tablet and turn off unnecessary background application thats running.
Do a quick search on "optimize tablet/ipad/crystalsky for inspire" .... there's a few out there.
For me, I just turn on "Airplane Mode" and this shuts off most apps that are not necessary. I dont know if this will help your situation but its worth giving a try.
That is my recommendation. As always, Test before flight.