While retracts would be cool...
The structural changes to the fuselage would be considerable resulting in a large weight gain to a model that is already heavy. Its even worse than a scale retract installation in an EDF/turbine F-22 because you need the long struts the model has for prop clearance.
A take-off dolly and some skids on the belly would be an option. Leave the weight and drag of the wheels on the ground.