Given that you'll likely need to move the CG quite far forward it's very likely that the stabilizers will be operating in a negative lift mode much or all of the time (on more regular models the stabilizer actuall lifts up like the wing but just not as strongly due to the typical 30% to 33% CG location). So you may find it helps to replace the stabilizers and elevators with an upside down lifting airfoil to enhance the effectiveness during landings where you need to lift the nose to flare. But start with the new CG location and more elevator travel.

Looking at the pictures of the full size plane if your elevators are scale in size I would not hesitate to set them up so they deflect on high rate to around 30 or even 35 degrees up angle. If you do that you SHOULD have sufficient elevator authourity for landing duties.